Editing Demographics of Thailand (section)

==Vital statistics==
===Registered births and deaths===
Although the UN classifies the birth and death registration of the National Statistics Office as incomplete the figures below clearly show the decreasing fertility in Thailand since the end of the 1950s. As of 2024 natural growth in Thailand is negative, which means that the number of deaths exceeds the number of births.
{| class="wikitable sortable" style="text-align: right;"
|-
! style="width:50pt;"| Year
! style="width:50pt;"| Population<ref name=NSO-2013>{{cite web|title=Population from Registration Record by Sex, 1988–2012|url=http://web.nso.go.th/en/pub/e_book/YEARBOOK_2013/#/75/zoomed|website=Statistical Yearbook Thailand 2013|publisher=National Statistical Office Thailand|access-date=17 Feb 2015|archive-date=1 April 2021|archive-url=https://web.archive.org/web/20210401215757/http://web.nso.go.th/en/pub/e_book/YEARBOOK_2013/#/75/zoomed|url-status=dead}}</ref>
! style="width:50pt;"| Live births
! style="width:50pt;"| Deaths
! style="width:50pt;"| Natural change
! style="width:50pt;"| Crude birth rate (per 1000)
! style="width:50pt;"| Crude death rate (per 1000)
! style="width:50pt;"| Natural change (per 1000)
! style="width:50pt;"| Total Fertility Rate
|-
|1957
|24,148,000
|777,436
|218,124
|559,294
|32.2
|9.0
|23.2
|
|-
|1958
|24,873,000
|970,155
|208,866
|761,289
|39.0
|8.4
|30.6
|
|-
|1959
|25,619,000
|801,380
|style="color: blue" |206,129
|595,254
|31.3
|8.0
|23.3
|
|-
|1960
|26,388,000
|915,538
|221,853
|693,685
|34.7
|8.4
|26.3
|
|-
|1961
|
|813,805
|210,709
|603,096
|
|
|
|
|-
|1962
|
|973,634
|221,157
|752,477
|
|
|
|
|-
|1963
|
|1,020,051
|233,192
|786,859
|
|
|
|
|-
|1964
|
|1,119,715
|231,095
|888,620
|
|
|
|
|-
|1965
|
|1,117,698
|216,830
|900,868
|
|
|
|
|-
|1966
|
|1,085,594
|236,243
|849,351
|
|
|
|
|-
|1967
|
|1,116,424
|230,622
|855,802
|
|
|
|
|-
|1968
|
|1,200,131
|232,116
|968,015
|
|
|
|
|-
|1969
|
|1,133,526
|243,444
|890,082
|
|
|
|
|-
|1970
|39,100,000
|1,145,293
|223,899
|921,394
|
|
|
|
|-
|1971
|39,760,000
| style="color: blue" | 1,221,228
|227,990
| style="color: blue" | 992,238
|
|
|
|
|-
|1972
|40,420,000
|1,189,950
|248,676
|941,274
|
|
|
|
|-
|1973
|41,080,000
|1,167,272
|293,151
|874,121
|
|
|
|
|-
|1974
|41,740,000
|1,185,869
|246,459
|939,410
|
|
|
|
|-
|1975
|42,400,000
|1,132,416
|234,550
|897,966
|
|
|
|
|-
|1976
|43,213,706
|1,166,292
|237,062
|929,230
|27.0
|5.5
|21.5
| style="color: blue" | 4.15
|-
|1977
|44,272,693
|1,079,331
|236,854
|842,477
|24.3
|5.3
|19.0
| style="color: blue" | 3.90
|-
|1978
|45,221,625
|1,040,218
|241,146
|799,072
|23.0
|5.3
|17.7
| style="color: blue" | 3.66
|-
|1979
|46,113,756
|1,073,436
|214,111
|859,325
|23.2
|4.6
|18.6
| style="color: blue" | 3.51
|-
|1980
|46,961,338
|1,077,300
|247,970
|729,320
|22.9
|5.3
|17.6
| style="color: blue" | 3.36
|-
|1981
|47,875,002
|1,062,238
|239,423
|822,815
|22.2
|5.0
|17.2
| style="color: blue" | 3.18
|-
|1982
|48,846,927
|1,075,632
|247,402
|828,230
|22.0
|5.0
|17.0
| style="color: blue" | 3.00
|-
| 1983
| 49,515,074
| 1,055,802
| 252,592
| 803,210
| style="color:blue;" | 21.3
| 5.1
| style="color: blue" |16.2
| style="color:blue;" |3.02
|-
| style="text-align:right;" | 1984
| style="text-align:right;" | 50,583,105
| style="text-align:right;" | 956,680
| style="text-align:right;" | 225,282
| style="text-align:right;" | 731,398
| style="text-align:right;" | 19.0
| style="text-align:right;" | 4.5
| style="text-align:right;" | 14.5
| style="text-align:right; color:blue;" |2.70
|-
| style="text-align:right;" | 1985
| style="text-align:right;" | 51,795,651
| style="text-align:right;" | 973,624
| style="text-align:right;" | 225,088
| style="text-align:right;" | 748,536
| style="text-align:right;" | 18.8
| style="text-align:right;" | 4.4
| style="text-align:right;" | 14.4
| style="text-align:right; color:blue;" |2.57
|-
| style="text-align:right;" | 1986
| style="text-align:right;" | 52,969,204
| style="text-align:right;" | 945,827
| style="text-align:right;" | 218,025
| style="text-align:right;" | 727,802
| style="text-align:right;" | 18.0
| style="color: blue" | 4.1
| style="text-align:right;" | 13.9
| style="text-align:right; color:blue;" | 2.45
|-
| style="text-align:right;" | 1987
| style="text-align:right;" | 53,873,172
| style="text-align:right;" | 884,043
| style="text-align:right;" | 232,968
| style="text-align:right;" | 651,075
| style="text-align:right;" | 16.5
| style="text-align:right;" | 4.3
| style="text-align:right;" | 12.2
| style="text-align:right; color:blue;" | 2.35
|-
| style="text-align:right;" | 1988
| style="text-align:right;" | 54,960,917
| style="text-align:right;" | 873,842
| style="text-align:right;" | 231,227
| style="text-align:right;" | 642,615
| style="text-align:right;" | 16.0
| style="text-align:right;" | 4.2
| style="text-align:right;" | 11.8
| style="text-align:right; color:blue;" | 2.26
|-
| style="text-align:right;" | 1989
| style="text-align:right;" | 55,888,393
| style="text-align:right;" | 905,837
| style="text-align:right;" | 246,570
| style="text-align:right;" | 659,267
| style="text-align:right;" | 16.3
| style="text-align:right;" | 4.4
| style="text-align:right;" | 11.9
| style="text-align:right; color:blue;" | 2.18
|-
| style="text-align:right;" | 1990
| style="text-align:right;" | 56,303,273
| style="text-align:right;" | 956,237
| style="text-align:right;" | 252,512
| style="text-align:right;" | 703,725
| style="text-align:right;" | 17.0
| style="text-align:right;" | 4.5
| style="text-align:right;" | 12.5
| style="text-align:right; color:blue;" | 2.11
|-
| style="text-align:right;" | 1991
| style="text-align:right;" | 56,961,030
| style="text-align:right;" | 960,556
| style="text-align:right;" | 264,350
| style="text-align:right;" | 696,206
| style="text-align:right;" | 17.0
| style="text-align:right;" | 4.7
| style="text-align:right;" | 12.3
| style="text-align:right;" | 2.06
|-
| style="text-align:right;"| 1992
| style="text-align:right;"| 57,788,965
| style="text-align:right;"| 964,557
| style="text-align:right;"| 275,313
| style="text-align:right;"| 689,244
| style="text-align:right;"| 16.8
| style="text-align:right;"| 4.8
| style="text-align:right;"|12.0
| style="text-align:right;"| 1.98
|-
| style="text-align:right;"| 1993
| style="text-align:right;"| 58,336,072
| style="text-align:right;"| 957,832
| style="text-align:right;"| 285,731
| style="text-align:right;"| 672,101
| style="text-align:right;"| 16.5
| style="text-align:right;"| 4.9
| style="text-align:right;"|11.6
| style="text-align:right;"|1.89
|-
| style="text-align:right;"| 1994
| style="text-align:right;"| 59,095,419
| style="text-align:right;"| 960,248
| style="text-align:right;"| 305,526
| style="text-align:right;"| 654,722
| style="text-align:right;"| 16.3
| style="text-align:right;"| 5.2
| style="text-align:right;"|11.1
| style="text-align:right;"|1.84
|-
| style="text-align:right;"| 1995
| style="text-align:right;"| 59,460,382
| style="text-align:right;"| 963,678
| style="text-align:right;"| 324,842
| style="text-align:right;"| 638,836
| style="text-align:right;"| 16.2
| style="text-align:right;"| 5.5
| style="text-align:right;"| 10.7
| style="text-align:right;"|1.81
|-
| style="text-align:right;"| 1996
| style="text-align:right;"| 60,116,182
| style="text-align:right;"| 983,395
| style="text-align:right;"| 315,467
| style="text-align:right;"| 667,928
| style="text-align:right;"| 16.3
| style="text-align:right;"| 5.2
| style="text-align:right;"| 11.1
| style="text-align:right;"|1.85
|-
| style="text-align:right;"| 1997
| style="text-align:right;"| 60,816,227
| style="text-align:right;"| 880,028
| style="text-align:right;"| 279,090
| style="text-align:right;"| 600,938
| style="text-align:right;"| 14.5
| style="text-align:right;"| 4.6
| style="text-align:right;"| 9.9
| style="text-align:right;"|1.69
|-
| style="text-align:right;"| 1998
| style="text-align:right;"| 61,466,178
| style="text-align:right;"| 862,260
| style="text-align:right;"| 344,210
| style="text-align:right;"| 518,050
| style="text-align:right;"| 14.0
| style="text-align:right;"| 5.6
| style="text-align:right;"| 8.4
| style="text-align:right;"|1.69
|-
| style="text-align:right;"| 1999
| style="text-align:right;"| 61,661,701
| style="text-align:right;"| 774,349
| style="text-align:right;"| 315,550
| style="text-align:right;"| 382,271
| style="text-align:right;"| 12.5
| style="text-align:right;"| 5.1
| style="text-align:right;"| 7.4
| style="text-align:right;"|1.51
|-
| style="text-align:right;"| 2000
| style="text-align:right;"| 61,878,746
| style="text-align:right;"| 773,009
| style="text-align:right;"| 365,741
| style="text-align:right;"| 407,268
| style="text-align:right;"| 12.5
| style="text-align:right;"| 5.9
| style="text-align:right;"| 6.6
| style="text-align:right;"|1.53
|-
| style="text-align:right;"| 2001
| style="text-align:right;"| 62,308,887
| style="text-align:right;"| 790,425
| style="text-align:right;"| 369,493
| style="text-align:right;"| 420,932
| style="text-align:right;"| 12.7
| style="text-align:right;"| 6.0
| style="text-align:right;"| 6.7
| style="text-align:right;"|1.54
|-
| style="text-align:right;"| 2002
| style="text-align:right;"| 62,799,872
| style="text-align:right;"| 782,911
| style="text-align:right;"| 380,364
| style="text-align:right;"| 402,547
| style="text-align:right;"| 12.5
| style="text-align:right;"| 6.1
| style="text-align:right;"| 6.4
| style="text-align:right;"|1.53
|-
| style="text-align:right;"| 2003
| style="text-align:right;"| 63,079,765
| style="text-align:right;"| 742,183
| style="text-align:right;"| 384,131
| style="text-align:right;"| 358,052
| style="text-align:right;"| 11.8
| style="text-align:right;"| 6.1
| style="text-align:right;"| 5.7
| style="text-align:right;"|1.47
|-
| style="text-align:right;"| 2004
| style="text-align:right;"| 61,973,621*
| style="text-align:right;"| 813,069
| style="text-align:right;"| 393,592
| style="text-align:right;"| 419,477
| style="text-align:right;"| 13.0
| style="text-align:right;"| 6.3
| style="text-align:right;"| 6.7
| style="text-align:right;"|1.55
|-
| style="text-align:right;"| 2005
| style="text-align:right;"| 62,418,054
| style="text-align:right;"| 809,485
| style="text-align:right;"| 395,374
| style="text-align:right;"| 414,111
| style="text-align:right;"| 13.0
| style="text-align:right;"| 6.4
| style="text-align:right;"| 6.6
| style="text-align:right;"|1.55
|-
| style="text-align:right;"| 2006
| style="text-align:right;"| 62,828,706
| style="text-align:right;"| 793,623
| style="text-align:right;"| 391,126
| style="text-align:right;"| 402,497
| style="text-align:right;"| 12.7
| style="text-align:right;"| 6.2
| style="text-align:right;"| 6.5
| style="text-align:right;"|1.53
|-
| style="text-align:right;"| 2007
| style="text-align:right;"| 63,038,247
| style="text-align:right;"| 797,588
| style="text-align:right;"| 393,255
| style="text-align:right;"| 404,333
| style="text-align:right;"| 12.7
| style="text-align:right;"| 6.3
| style="text-align:right;"| 6.4
| style="text-align:right;"| 1.54
|-
| style="text-align:right;"| 2008
| style="text-align:right;"| 63,389,730
| style="text-align:right;"| 784,256
| style="text-align:right;"| 397,326
| style="text-align:right;"| 386,930
| style="text-align:right;"| 12.4
| style="text-align:right;"| 6.3
| style="text-align:right;"| 6.1
| style="text-align:right;"| 1.51
|-
| style="text-align:right;"| 2009
| style="text-align:right;"| 63,525,062
| style="text-align:right;"| 765,047
| style="text-align:right;"| 393,916
| style="text-align:right;"| 371,131
| style="text-align:right;"| 12.1
| style="text-align:right;"| 6.2
| style="text-align:right;"| 5.9
| style="text-align:right;"| 1.47
|-
| style="text-align:right;"| 2010
| style="text-align:right;"| 63,878,267
| style="text-align:right;"| 761,689
| style="text-align:right;"| 411,331
| style="text-align:right;"| 350,358
| style="text-align:right;"| 12.0
| style="text-align:right;"| 6.5
| style="text-align:right;"| 5.5
| style="text-align:right;"| 1.49
|-
| style="text-align:right;"| 2011
| style="text-align:right;"| 64,076,033
| style="text-align:right;"| 782,198
| style="text-align:right;"| 414,670
| style="text-align:right;"| 367,528
| style="text-align:right;"| 12.2
| style="text-align:right;"| 6.5
| style="text-align:right;"| 5.7
| style="text-align:right;"|1.55
|-
| style="text-align:right;"| 2012
| style="text-align:right;"| 64,456,695
| style="text-align:right;"| 780,975
| style="text-align:right;"| 415,141
| style="text-align:right;"| 365,834
| style="text-align:right;"| 12.2
| style="text-align:right;"| 6.5
| style="text-align:right;"| 5.7
| style="text-align:right;"|1.56
|-
| style="text-align:right;"| 2013
| style="text-align:right;"| 64,785,909
| style="text-align:right;"| 748,081
| style="text-align:right;"| 426,065
| style="text-align:right;"| 322,016
| style="text-align:right;"| 11.6
| style="text-align:right;"| 6.6
| style="text-align:right;"| 5.0
| style="text-align:right;"| 1.46
|-
| style="text-align:right;"| 2014
| style="text-align:right;"| 65,124,716
| style="text-align:right;"| 711,081
| style="text-align:right;"| 435,624
| style="text-align:right;"| 275,457
| style="text-align:right;"| 11.0
| style="text-align:right;"| 6.7
| style="text-align:right;"| 4.3
| style="text-align:right;"| 1.41
|-
| style="text-align:right;"| 2015<ref>{{cite book |last1=Kijsanayotin |first1=Boonchai |url=http://www.this.or.th/files/77.pdf |title=Review of National Civil Registration and Vital Statistics Systems: A case study of Thailand |last2=Ingun |first2=Pianghatai |last3=Sumputtanon |first3=Kanet |date=Mar 2003 |publisher=Thai Health Information Standards Development Center (THIS) |isbn=978-616-11-1913-3 |location=Bangkok |page=12 |access-date=15 Feb 2015 |archive-url=https://web.archive.org/web/20210125081406/https://www.this.or.th/files/77.pdf |archive-date=25 January 2021 |url-status=dead}}</ref><ref>{{cite web |title=4. Vital statistics summary and life expectancy at birth: 2010–2014 |url=http://unstats.un.org/unsd/demographic/products/dyb/dyb2014/Table04.pdf |access-date=26 January 2016 |website=UNstats |publisher=United Nations}}</ref>
| style="text-align:right;"| 65,729,098
| style="text-align:right;"| 679,502
| style="text-align:right;"| 445,964
| style="text-align:right;"| 233,538
| style="text-align:right;"| 10.4
| style="text-align:right;"| 6.9
| style="text-align:right;"| 3.5
| style="text-align:right;"| 1.45
|-
| style="text-align:right;"| 2016
| style="text-align:right;"| 65,931,550
| style="text-align:right;"| 666,207
| style="text-align:right;"| 469,085
| style="text-align:right;"| 197,122
| style="text-align:right;"| 10.2
| style="text-align:right;"| 7.2
| style="text-align:right;"| 3.0
| style="text-align:right;"| 1.39
|-
| style="text-align:right;"| 2017<ref name="NESDB-2019">{{cite web |date=11 February 2019 |title=Population, birth and death throughout the Kingdom, 1993 – 2018 |url=http://social.nesdb.go.th/SocialStat/StatReport_Final.aspx?reportid=68&template=2R1C&yeartype=M&subcatid=1 |url-status=dead |archive-url=https://web.archive.org/web/20190904063820/http://social.nesdb.go.th/SocialStat/StatReport_Final.aspx?reportid=68&template=2R1C&yeartype=M&subcatid=1 |archive-date=4 September 2019 |access-date=23 September 2019 |website=National Economic and Social Development Board}}</ref>
| style="text-align:right;"| 66,188,503
| style="text-align:right;"| 656,570
| style="text-align:right;"| 458,010
| style="text-align:right;"| 198,560
| style="text-align:right;"| 10.1
| style="text-align:right;"| 7.0
| style="text-align:right;"| 3.1
| style="text-align:right;"| 1.38
|-
| style="text-align:right;"| 2018<ref name="NESDB-2019" />
| style="text-align:right;"| 66,413,979
| style="text-align:right;"| 628,450
| style="text-align:right;"| 461,818
| style="text-align:right;"| 166,632
| style="text-align:right;"| 9.6
| style="text-align:right;"| 7.1
| style="text-align:right;"| 2.5
| style="text-align:right;"| 1.36
|-
| style="text-align:right;"| 2019<ref>{{Cite web |title=National Economic and Social Development Council |url=https://www.nesdc.go.th/ewt_dl_link.php?nid=3507 |access-date=3 August 2020 |format=XLS}}</ref>
| style="text-align:right; color:blue;"| 66,558,935
| style="text-align:right;"| 596,736
| style="text-align:right;"| 494,339
| style="text-align:right;"| 102,397
| style="text-align:right;"| 9.1
| style="text-align:right;"| 7.5
| style="text-align:right;"| 1.6
| style="text-align:right;"| 1.25
|-
| style="text-align:right;"| 2020
| style="text-align:right;"| 66,186,727
| style="text-align:right;"| 569,338
| style="text-align:right;"| 489,717
| style="text-align:right;"| 79,621
| style="text-align:right;"| 8.7
| style="text-align:right;"| 7.5
| style="text-align:right;"| 1.2
| style="text-align:right;"| 1.18
|-
| style="text-align:right;"| 2021
| style="text-align:right;"| 66,171,439
| style="text-align:right;"| 544,570
| style="text-align:right;"| 563,650
| style="text-align:right; color:red;"| −19,080
| style="text-align:right;"| 8.1
| style="text-align:right;"| 8.4
| style="text-align:right; color:red;"| −0.3
| style="text-align:right; "| 1.16
|-
| style="text-align:right;"| 2022
| style="text-align:right;"| 66,090,475
| style="text-align:right;"| 502,107
| style="text-align:right; color:red;"| 595,965
| style="text-align:right; color:red;"| −93,858
| style="text-align:right;"| 7.6
| style="text-align:right; color:red;"| 9.0
| style="text-align:right; color:red;"| −1.4
| style="text-align:right;"| 1.07
|-
| style="text-align:right;"| 2023
| style="text-align:right;"| 66,052,615
| style="text-align:right;"| 517,934
| style="text-align:right;"| 565,992
| style="text-align:right; color:red;"| −48,058
| style="text-align:right;"| 7.8
| style="text-align:right;"| 8.5
| style="text-align:right; color:red;"| −0.7
| style="text-align:right;"| 1.10(e)
|-
| style="text-align:right;"| 2024
| style="text-align:right;"| 65,951,210
| style="text-align:right; color:red;"| 462,240
| style="text-align:right;"| 571,646 
| style="text-align:right; color:red;"| −109,406
| style="text-align:right; color:red; "| 7.0
| style="text-align:right;"| 8.7
| style="text-align:right; color:red;"| −1.7
| style="text-align:right; color:red;"| 0.98(e)
|}

===Current vital statistics===
<ref>{{cite web |title=Population statistics of the civil registration (monthly) |url=https://stat.bora.dopa.go.th/stat/statnew/statMONTH/statmonth/#/mainpage}}</ref>

{| class="wikitable" style="text-align:center;"
|+
|-
! Period
! Live births
! Deaths
! Natural increase
|-
| '''January—April 2024'''
| 149,751
| 199,276
| −49,525
|-
| '''January—April 2025'''
| 134,919
| 193,070
| −58,151
|-
| '''Difference'''
| {{decrease}} −14,832 (−9.90%)
| {{decreasepositive}} -6,206 (-3.11%)
| {{decrease}} −8,626
|}

===UN estimates===
{| class="wikitable" style="text-align:right;"
|+Statistics for births and deaths: all figures are per year
! style="width:50pt;"|Period
! style="width:60pt;"|Live<br>births
! style="width:60pt;"|Deaths
! style="width:60pt;"|Natural<br>change
! style="width:30pt;"|CBR<sup>1</sup>
! style="width:30pt;"|CDR<sup>1</sup>
! style="width:30pt;"|NC<sup>1</sup>
! style="width:30pt;"|TFR<sup>1</sup>
! style="width:30pt;"|IMR<sup>1</sup>
|-
| 1950–1955
| 940 000
| 344 000
| 596 000
| 42.5
| 15.6
| 27.0
| 6.14
| 130.3
|-
| 1955–1960
| 1 093 000
| 348 000
| 745 000
| 43.0
| 13.7
| 29.3
| 6.14
| 108.7
|-
| 1960–1965
| style="text-align:right;"| 1 249 000
| style="text-align:right;"| 353 000
| style="text-align:right;"| 896 000
| style="text-align:right;"| 42.3
| style="text-align:right;"| 12.0
| style="text-align:right;"| 30.3
| style="text-align:right;"| 6.13
| style="text-align:right;"| 90.5
|-
| 1965–1970
| 1 386 000
| 362 000
| 1 025 000
| 40.4
| 10.5
| 29.8
| 5.99
| 75.5
|-
| 1970–1975
| 1 371 000
| 355 000
| 1 016 000
| 34.6
| 8.9
| 25.6
| 5.05
| 63.2
|-
| 1975–1980
| style="text-align:right;"| 1 297 000
| style="text-align:right;"| 338 000
| style="text-align:right;"| 959 000
| style="text-align:right;"| 28.9
| style="text-align:right;"| 7.5
| style="text-align:right;"| 21.3
| style="text-align:right;"| 3.92
| style="text-align:right;"| 50.4
|-
| 1980–1985
| style="text-align:right;"| 1 201 000
| style="text-align:right;"| 300 000
| style="text-align:right;"| 901 000
| style="text-align:right;"| 24.1
| style="text-align:right;"| 6.0
| style="text-align:right;"| 18.1
| style="text-align:right;"| 2.95
| style="text-align:right;"| 38.9
|-
| 1985–1990
| style="text-align:right;"| 1 113 000
| style="text-align:right;"| 266 000
| style="text-align:right;"| 848 000
| style="text-align:right;"| 20.4
| style="text-align:right;"| 4.9
| style="text-align:right;"| 15.5
| style="text-align:right;"| 2.30
| style="text-align:right;"| 29.1
|-
| 1990–1995
| style="text-align:right;"| 1 050 000
| style="text-align:right;"| 313 000
| style="text-align:right;"| 737 000
| style="text-align:right;"| 18.0
| style="text-align:right;"| 5.4
| style="text-align:right;"| 12.6
| style="text-align:right;"| 1.99
| style="text-align:right;"| 22.6
|-
| 1995–2000
| style="text-align:right;"| 955 000
| style="text-align:right;"| 373 000
| style="text-align:right;"| 582 000
| style="text-align:right;"| 15.6
| style="text-align:right;"| 6.1
| style="text-align:right;"| 9.5
| style="text-align:right;"| 1.77
| style="text-align:right;"| 18.6
|-
| 2000–2005
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 13.6
| style="text-align:right;"| 7.0
| style="text-align:right;"| 6.6
| style="text-align:right;"| 1.60
| style="text-align:right;"| 
|-
| 2005–2010
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 12.3
| style="text-align:right;"| 7.2
| style="text-align:right;"| 5.1
| style="text-align:right;"| 1.56
| style="text-align:right;"| 
|-
| 2010–2015
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 11.2
| style="text-align:right;"| 7.3
| style="text-align:right;"| 3.9
| style="text-align:right;"| 1.53
| style="text-align:right;"| 
|-
| 2015–2020
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 10.5
| style="text-align:right;"| 7.6
| style="text-align:right;"| 2.9
| style="text-align:right;"| 1.53
| style="text-align:right;"|
|-style="background:#FFFF80;"
| 2020–2025
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 9.5
| style="text-align:right;"| 8.3
| style="text-align:right;"| 1.2
| style="text-align:right;"| 1.46
| style="text-align:right;"|
|-style="background:#FFFF80;"
| 2025–2030
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 
| style="text-align:right;"| 8.9
| style="text-align:right;"| 9.1
| style="text-align:right;"| −0.2
| style="text-align:right;"| 1.42
| style="text-align:right;"|

|}
<sup>1</sup> <small>CBR = crude birth rate (per 1000); CDR = crude death rate (per 1000); NC = natural change (per 1000); TFR = total fertility rate (number of children per woman); IMR = infant mortality rate per 1000 births</small>. Sources:<ref>{{cite web |url=https://population.un.org/wpp/DataQuery/ |title=Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat, World Population Prospects: The 2019 Revision}}</ref><br>
Figures highlighted in yellow are projections.

=== Life expectancy at birth ===
[[File:Life expectancy in Thailand.svg|thumb|Life expectancy in Thailand since 1937]]
[[File:Life expectancy by WBG -Thailand -diff.png|thumb|Life expectancy in Thailand since 1960 by gender]]
Average [[life expectancy at birth]] of the total population.<ref>{{Cite web|title=World Population Prospects – Population Division – United Nations – [Filter:] Thailand|url=https://data.un.org/Data.aspx?d=PopDiv&f=variableID%3A68#PopDiv|access-date=2020-12-05|website=esa.un.org}}</ref>

{| class="wikitable" style="text-align:center"
!Period
!Life<br>expectancy<br />(years)
!Period
!Life<br>expectancy<br />(years)
|-
|1950–1955
|50.8
|1985–1990
|69.8
|-
|1955–1960
|53.3
|1990–1995
|70.2
|-
|1960–1965
|56.1
|1995–2000
|70.3
|-
|1965–1970
|58.2
|2000–2005
|71.2
|-
|1970–1975
|60.7
|2005–2010
|73.2
|-
|1975–1980
|63.3
|2010–2015
|75.2
|-
|1980–1985
|65.8
|2015–2020
|76.8
|-
|}

=== Total fertility rate ===
Thailand’s population declined by 100,000 in 2024 to 65.95 million in 2024.<ref name=":1">{{Cite web |date=17 January 2025 |title=Thailand's population drops below 66 million as births hit 75-year low |url=https://www.khaosodenglish.com/featured/2025/01/17/thailands-population-drops-below-66-million-as-births-hit-75-year-low/ |url-status=live |archive-url=https://web.archive.org/web/20250118055652/https://www.khaosodenglish.com/featured/2025/01/17/thailands-population-drops-below-66-million-as-births-hit-75-year-low/ |archive-date=18 Jan 2025 |access-date=25 March 2025 |website=Khaosod}}</ref> Annual births fell below 500,000 for the first time since 1949.<ref name=":1" /> In 2024, 462,240 births versus 571,646 deaths were recorded.<ref name=":1" /> Thailand’s Total Fertility Rate (TFR) declined to 1.0, which is lower than Japan’s 1.2.<ref name=":1" /> This makes Thailand an ultra-low fertility country like South Korea and Singapore.<ref name=":1" /> Demographic projections predict that the population could shrink to 40 million in 50 years.<ref name=":1" /> This would be a decrease of 25 million or 1 million people per 2 years.<ref name=":1" /> A survey with over 1,000 Thais showed that 71% regard the low birthrate as a national crisis, while only 35.8% of fertile people plan to have children.<ref name=":1" /> The government's “Having Children for the Nation” campaign proves to be ineffective.<ref name=":1" />

=== Marriages and divorce ===
In 2024, the marriage registry had 263,087 new couples, while 147,621 couples divorced.<ref name=":1" />

===Demographic and Health Surveys===
[[Total fertility rate]] (TFR) in Thailand by region and year:<ref>{{Cite web |title=Summary Results |url=http://web.nso.go.th/en/survey/popchan/data/Summary%20Results.pdf |url-status=dead |archive-url=https://web.archive.org/web/20161105161134/http://web.nso.go.th/en/survey/popchan/data/Summary%20Results.pdf |archive-date=2016-11-05}}</ref>

{| class="wikitable sortable"
! Region !! 2005–06 !! 1995–96 !! 1985–86
|-
| '''Thailand (total)''' || 1.471 || 2.022 || 2.730
|-
| ''Urban'' || 1.033 || 1.332 || 1.766
|-
| ''Rural'' || 1.727 || 2.285 || 2.962
|-
| [[Bangkok]] Metropolis || 0.878 || 1.261 || 1.735
|-
| [[Central Thailand|Central Region]]<ref>excluding Bangkok</ref> || 1.190 || 1.664 || 2.494
|-
| [[Northern Thailand|Northern Region]] || 1.575 || 1.894 || 2.248
|-
| [[Northeastern Thailand|Northeastern Region]] || 2.038 || 2.435 || 3.096
|-
| [[Southern Thailand|Southern Region]] || 1.524 || 2.851 || 4.049
|}

[[Total fertility rate]] (TFR) in Thailand by [[provinces of Thailand|province]] as of 2010:<ref>[http://thailand.unfpa.org/en/publications/state-thailand%E2%80%99s-population-report-2015 The State of Thailand’s Population Report 2015: Features of Thai Families in the Era of Low Fertility and Longevity] (UNFPA)</ref>
{| class="wikitable sortable"
! [[Provinces of Thailand|Province]] !! [[Total fertility rate|Total<br>fertility<br>rate]]
|-
| [[Bangkok]] Metropolis || 0.89
|-
| [[Samut Prakan]] || 0.86
|-
| [[Nonthaburi Province|Nonthaburi]] || 1.03
|-
| [[Pathum Thani Province|Pathum Thani]] || 0.78
|-
| [[Phra Nakhon Si Ayutthaya Province|Phra Nakhon Si Ayutthaya]] || 1.54
|-
| [[Ang Thong Province|Ang Thong]] || 1.64
|-
| [[Lopburi Province|Lopburi]] || 1.66
|-
| [[Sing Buri Province|Sing Buri]] || 1.71
|-
| [[Chai Nat Province|Chai Nat]] || 1.63
|-
| [[Saraburi Province|Saraburi]] || 1.87
|-
| [[Chonburi Province|Chonburi]] || 0.60
|-
| [[Rayong Province|Rayong]] || 1.23
|-
| [[Chanthaburi Province|Chanthaburi]] || 1.40
|-
| [[Trat Province|Trat]] || 1.42
|-
| [[Chachoengsao Province|Chachoengsao]] || 1.34
|-
| [[Prachinburi Province|Prachinburi]] || 1.48
|-
| [[Nakhon Nayok Province|Nakhon Nayok]] || 1.67
|-
| [[Sa Kaeo Province|Sa Kaeo]] || 2.16
|-
| [[Nakhon Ratchasima Province|Nakhon Ratchasima]] || 1.65
|-
| [[Buriram Province|Buriram]] || 2.07
|-
| [[Surin Province|Surin]] || 2.26
|-
| [[Sisaket Province|Sisaket]] || 2.09
|-
| [[Ubon Ratchathani Province|Ubon Ratchathani]] || 1.65
|-
| [[Yasothon Province|Yasothon]] || 1.88
|-
| [[Chaiyaphum Province|Chaiyaphum]] || 1.88
|-
| [[Amnat Charoen Province|Amnat Charoen]] || 1.86
|-
| [[Bueng Kan Province|Bueng Kan]] || 2.06
|-
| [[Nong Bua Lamphu Province|Nong Bua Lamphu]] || 1.95
|-
| [[Khon Kaen Province|Khon Kaen]] || 1.47
|-
| [[Udon Thani Province|Udon Thani]] || 1.56
|-
| [[Loei Province|Loei]] || 1.60
|-
| [[Nong Khai Province|Nong Khai]] || 1.65
|-
| [[Maha Sarakham Province|Maha Sarakham]] || 1.50
|-
| [[Roi Et Province|Roi Et]] || 2.06
|-
| [[Kalasin]] || 1.73
|-
| [[Sakon Nakhon]] || 1.66
|-
| [[Nakhon Phanom]] || 1.94
|-
| [[Mukdahan]] || 1.63
|-
| [[Chiang Mai]] || 1.22
|-
| [[Lamphun]] || 1.26
|-
| [[Lampang]] || 1.45
|-
| [[Uttaradit]] || 1.80
|-
| [[Phrae]] || 1.66
|-
| [[Nan Province|Nan]] || 1.77
|-
| [[Phayao]] || 1.45
|-
| [[Chiang Rai]] || 1.59
|-
| [[Mae Hong Son]] || 1.66
|-
| [[Nakhon Sawan]] || 1.69
|-
| [[Uthai Thani]] || 1.31
|-
| [[Kamphaeng Phet]] || 1.86
|-
| [[Tak Province|Tak]] || 1.94
|-
| [[Sukhothai Province|Sukhothai]] || 1.83
|-
| [[Phitsanulok]] || 1.70
|-
| [[Phichit]] || 1.98
|-
| [[Phetchabun]] || 1.90
|-
| [[Ratchaburi]] || 1.37
|-
| [[Kanchanaburi]] || 1.81
|-
| [[Suphan Buri]] || 1.72
|-
| [[Nakhon Pathom]] || 1.04
|-
| [[Samut Sakhon]] || 0.98
|-
| [[Samut Songkhram]] || 1.58
|-
| [[Phetchaburi]] || 1.37
|-
| [[Prachuap Khiri Khan]] || 1.52
|-
| [[Nakhon Si Thammarat]] || 1.78
|-
| [[Krabi]] || 1.68
|-
| [[Phang Nga]] || 1.70
|-
| [[Phuket]] || 0.88
|-
| [[Surat Thani]] || 1.30
|-
| [[Ranong]] || 1.29
|-
| [[Chumphon]] || 1.40
|-
| [[Songkhla]] || 1.47
|-
| [[Satun]] || 1.92
|-
| [[Trang Province|Trang]] || 1.53
|-
| [[Phatthalung]] || 1.82
|-
| [[Pattani Province|Pattani]] || 1.80
|-
| [[Yala Province|Yala]] || 1.84
|-
| [[Narathiwat]] || 2.00
|}