Editing Delaware County, Pennsylvania (section)

===Population ranking===
The population ranking of the following table is based on the [[2020 United States census|2020 census]] of Delaware County.<ref>{{Cite web |last= |first= |title=2020 Census Results |url=https://www.census.gov/2020results |access-date=February 10, 2024 |website=Census.gov}}</ref>

'''†''' ''county seat''
{| class="wikitable sortable"
|-
!Rank
!City/Town/etc.
!Municipal type
!Population (2020 Census)
!Total Area
!Population Density
!Incorporation
!Settlement
|-
|1
|[[Upper Darby Township, Pennsylvania|'''Upper Darby''']]
|Township
| 85,681
| 7.83 sq mi
|{{Pop density|85681|7.83|sqmi|prec=1}}
| 1736
| 1653
|-
|2
|[[Haverford Township, Delaware County, Pennsylvania|'''Haverford''']]
|Township
| 50,431
| 9.95 sq mi
|{{Pop density|50431|9.95|sqmi|prec=1}}
| 1682
| 1682
|-
|3
|[[Radnor Township, Delaware County, Pennsylvania|'''Radnor''']]
|Township
| 33,228
| 13.79 sq mi
|{{Pop density|33228|13.79|sqmi|prec=1}}
| 1684
| 1682
|- style="background:#fffacd;"
| 4
|'''[[Chester, Pennsylvania|Chester]]'''
| City
| 32,605
| 6.00 sq mi
|{{Pop density|32605|6|sqmi|prec=1}}
| 1701 (borough) 1866 (city)
| 1644
|-
|5
|'''[[Ridley Township, Pennsylvania|Ridley]]'''
|Township
| 31,053
| 5.31 sq mi
|{{Pop density|31053|5.31|sqmi|prec=1}}
| 1687
| 1647
|- style="background:honeyDew;"
| 6
|'''[[Drexel Hill, Pennsylvania|Drexel Hill]]'''
| CDP
| 29,181
| 3.20 sq mi
|{{Pop density|29181|3.2|sqmi|prec=1}}
|-
|7
|'''[[Springfield Township, Delaware County, Pennsylvania|Springfield]]'''
|Township
| 25,070
| 6.34 sq mi
|{{Pop density|25070|6.34|sqmi|prec=1}}
| 1686
| 1682
|-
|8
|'''[[Marple Township, Pennsylvania|Marple]]'''
|Township
| 24,214
| 10.52 sq mi
|{{Pop density|24214|10.52|sqmi|prec=1}}
| 1684
| 1684
|-
| 9
|'''[[Concord Township, Delaware County, Pennsylvania|Concord]]'''
|Township
| 18,295
| 13.64 sq mi
|{{Pop density|18295|13.64|sqmi|prec=1}}
| 1683
| 1660
|-
|10
|'''[[Upper Chichester Township, Pennsylvania|Upper Chichester]]'''
|Township
| 16,898
| 6.70 sq mi
|{{Pop density|16987|6.71|sqmi|prec=1}}
| 1759
| 1881
|- 
|11
|'''[[Aston Township, Pennsylvania|Aston]]'''
|Township
| 16,791
| 5.84 sq mi
|{{Pop density|16792|5.83|sqmi|prec=1}}
| 1688
| 1681
|-
|12
|'''[[Middletown Township, Delaware County, Pennsylvania|Middletown]]'''
|Township
| 16,373
| 13.47 sq mi
|{{Pop density|16373|13.47|sqmi|prec=1}}
| 1686
| 1681
|-
| 13
|'''[[Newtown Township, Delaware County, Pennsylvania|Newtown]]'''
|Township
| 15,002
| 10.09 sq mi
|{{Pop density|15002|10.09|sqmi|prec=1}}
| 1684
| 1681
|-
| 14
| '''[[Nether Providence Township, Pennsylvania|Nether Providence]]'''
|Township
| 14,525
| 4.72 sq mi
|{{Pop density|14525|4.72|sqmi|prec=1}}
| 1687
| 1687
|- style="background:honeyDew;"
| 15
|'''[[Ardmore, Pennsylvania|Ardmore]]''' (''partially in Montgomery County'')
| CDP
| 13,566
| 1.97 sq mi
|{{Pop density|13566|1.97|sqmi|prec=1}}

|- style="background:seaShell;"
| 16
|'''[[Yeadon, Pennsylvania|Yeadon]]'''
| Borough
| 12,054
| 1.59 sq mi
|{{Pop density|12054|1.59|sqmi|prec=1}}
| 1893
| 1682
|- style="background:honeyDew;"
| 17
|'''[[Broomall, Pennsylvania|Broomall]]'''
| CDP
| 11,718
| 3.17 sq mi
|{{Pop density|11718|3.17|sqmi|prec=1}}
|- style="background:seaShell;"
| 18
|'''[[Lansdowne, Pennsylvania|Lansdowne]]'''
| Borough
| 11,107
| 1.18 sq mi
|{{Pop density|11107|1.18|sqmi|prec=1}}
| 1893
| 1732
|-
| 19
| '''[[Upper Providence Township, Delaware County, Pennsylvania|Upper Providence]]'''
|Township
| 10,852
| 5.81 sq mi
|{{Pop density|10852|5.81|sqmi|prec=1}}
| 1687
| 
|- style="background:seaShell;"
| 20
|'''[[Darby, Pennsylvania|Darby]]'''
| Borough
| 10,715
| 0.84 sq mi
|{{Pop density|10715|0.84|sqmi|prec=1}}
| 1653
| 
|- style="background:honeyDew;"
| 21
|'''[[Woodlyn, Pennsylvania|Woodlyn]]'''
| CDP
| 9,685
| 1.7 sq mi
|{{Pop density|9685|1.7|sqmi|prec=1}}
|- 
| 22
| '''[[Bethel Township, Delaware County, Pennsylvania|Bethel]]'''
|Township
| 9,574
| 5.41 sq mi
|{{Pop density|9574|5.41|sqmi|prec=1}}
| 1683
| 1682
|-
| 23
|'''[[Darby Township, Pennsylvania|Darby]]'''
|Township
|9,219
| 1.42 sq mi
|{{Pop density|9219|1.42|sqmi|prec=1}}
| 1683
| 1682
|- style="background:seaShell;"
| 24
|'''[[Collingdale, Pennsylvania|Collingdale]]'''
| Borough
| 8,908
| 0.87 sq mi
|{{Pop density|8908|0.87|sqmi|prec=1}}
| 1891
| 
|- style="background:seaShell;"
| 25
|'''[[Brookhaven, Pennsylvania|Brookhaven]]'''
| Borough
| 8,300
| 1.71 sq mi
|{{Pop density|8300|1.7|sqmi|prec=1}}
| 1945
| 1684
|- style="background:honeyDew;"
| 26
|'''[[Folsom, Pennsylvania|Folsom]]'''
| CDP
| 8,287
| 1.25 sq mi
|{{Pop density|8287|1.25|sqmi|prec=1}}
|- style="background:honeyDew;"
| 27
|'''[[Villanova, Pennsylvania|Villanova]]''' (''partially in Montgomery County'')
| CDP
| 8,213
| 2.09 sq mi
|{{Pop density|8213|2.09|sqmi|prec=1}}
|- style="background:honeyDew;"
| 28
|'''[[Village Green-Green Ridge, Pennsylvania|Village Green-Green Ridge]]'''
| CDP
| 8,000
| 1.9 sq mi
|{{Pop density|8000|1.9|sqmi|prec=1}}
|- style="background:seaShell;"
| 29
|'''[[Glenolden, Pennsylvania|Glenolden]]'''
| Borough
| 7,223
| 0.97 sq mi
|{{Pop density|7223|0.97|sqmi|prec=1}}
| 1894
| 
|- style="background:seaShell;"
| 30
|'''[[Ridley Park, Pennsylvania|Ridley Park]]'''
| Borough
| 7,186
| 1.08 sq mi
|{{Pop density|7186|1.08|sqmi|prec=1}}
| 1897
| 
|- style="background:honeyDew;"
| 31
|'''[[Wayne, Pennsylvania|Wayne]]'''
| CDP
| 7,160
| 2.12 sq mi
|{{Pop density|7160|2.12|sqmi|prec=1}}
|-
| 32
|'''[[Thornbury Township, Delaware County, Pennsylvania|Thornbury]]'''
|Township
|6,904
| 9.27 sq mi
|{{Pop density|6904|9.27|sqmi|prec=1}}
| 1687
| 
|- style="background:seaShell;"
| 33
|'''[[Clifton Heights, Pennsylvania|Clifton Heights]]'''
| Borough
| 6,863
| 0.63 sq mi
|{{Pop density|6863|0.63|sqmi|prec=1}}
| 1885
| 
|- style="background:seaShell;"
| 34
|'''[[Folcroft, Pennsylvania|Folcroft]]'''
| Borough
| 6,792
| 1.42 sq mi
|{{Pop density|6792|1.42|sqmi|prec=1}}
| 1922
| 
|- style="background:seaShell;"
| 35
|'''[[Swarthmore, Pennsylvania|Swarthmore]]'''
| Borough
| 6,543
| 1.40 sq mi
|{{Pop density|6543|1.40|sqmi|prec=1}}
| 1893
| 1724
|- style="background:seaShell;"
| 36
|'''[[Prospect Park, Pennsylvania|Prospect Park]]'''
| Borough
| 6,427
| 0.74 sq mi
|{{Pop density|6427|0.74|sqmi|prec=1}}
| 1894
| 1694
|- style="background:seaShell;"
| 37
|'''[[Sharon Hill, Pennsylvania|Sharon Hill]]'''
| Borough
| 6,014
| 0.77 sq mi
|{{Pop density|6014|0.77|sqmi|prec=1}}
| 1890
| 
|- style="background:seaShell;"
| 38
|'''[[Norwood, Pennsylvania|Norwood]]'''
| Borough
| 5,943
| 0.82 sq mi
|{{Pop density|5943|0.82|sqmi|prec=1}}
| 1893
| 
|- style="background:seaShell;"
| 39
|'''† [[Media, Pennsylvania|Media]]'''
| Borough
| 5,901
| 0.77 sq mi
|{{Pop density|5901|0.77|sqmi|prec=1}}
| 1850
| 1681
|- style="background:honeyDew;"
| 40
|'''[[Bryn Mawr, Pennsylvania|Bryn Mawr]]''' (''mostly in Montgomery County'')
| CDP
| 5,879
| 0.96 sq mi
|{{Pop density|5879|0.96|sqmi|prec=1}}
|- style="background:honeyDew;"
| 41
|'''[[Boothwyn, Pennsylvania|Boothwyn]]'''
| CDP
| 4,968
| 1.25 sq mi
|{{Pop density|4968|1.25|sqmi|prec=1}}
|-
| 42
|'''[[Edgmont Township, Delaware County, Pennsylvania|Edgmont]]'''
|Township
|4,283
| 9.73 sq mi
|{{Pop density|4283|9.73|sqmi|prec=1}}
| 1687
| 1687
|- style="background:seaShell;"
| 43
|'''[[Aldan, Pennsylvania|Aldan]]'''
| Borough
| 4,244
| 0.60 sq mi
|{{Pop density|4244|0.6|sqmi|prec=1}}
| 1893
| 
|-
| 44
| '''[[Chester Township, Pennsylvania|Chester]]'''
|Township
| 4,080
| 1.43 sq mi
|{{Pop density|4080|1.43|sqmi|prec=1}}
| 1683
| 
|-
| 45
|'''[[Tinicum Township, Delaware County, Pennsylvania|Tinicum]]'''
|Township
|3,983
| 8.78 sq mi
|{{Pop density|3983|8.78|sqmi|prec=1}}
| 1780
| 1643
|-
| 46
| '''[[Chadds Ford Township, Pennsylvania|Chadds Ford]]'''
|Township
| 3,972
| 8.72 sq mi
|{{Pop density|3972|8.72|sqmi|prec=1}}
| 1684
| 
|- style="background:honeyDew;"
| 47
|'''[[Linwood, Pennsylvania|Linwood]]'''
| CDP
| 3,949
| 0.65 sq mi
|{{Pop density|3949|0.65|sqmi|prec=1}}
|- style="background:honeyDew;"
| 48
|'''[[St. Davids, Pennsylvania|St. Davids]]'''
| CDP
| 3,604
| 1.5 sq mi
|{{Pop density|3604|1.5|sqmi|prec=1}}
|- style="background:honeyDew;"
| 49
|'''[[Rosemont, Pennsylvania|Rosemont]]''' (''mostly in Montgomery County'')
| CDP
| 3,507
| 0.82 sq mi
|{{Pop density|3507|0.82|sqmi|prec=1}}
|-
| 50
|'''[[Lower Chichester Township, Pennsylvania|Lower Chichester]]'''
|Township
|3,425
| 1.07 sq mi
|{{Pop density|3425|1.07|sqmi|prec=1}}
| 1682
| 16678
|- style="background:seaShell;"
| 51
|'''[[Upland, Pennsylvania|Upland]]'''
| Borough
| 3,068
| 0.65 sq mi
|{{Pop density|3068|0.65|sqmi|prec=1}}
| 1869
| 1683
|- style="background:seaShell;"
| 52
|'''[[Chester Heights, Pennsylvania|Chester Heights]]'''
| Borough
| 2,897
| 2.22 sq mi
|{{Pop density|2897|2.22|sqmi|prec=1}}
| 1945
| 
|- style="background:seaShell;"
| 53
|'''[[Morton, Pennsylvania|Morton]]'''
| Borough
| 2,778
| 0.36 sq mi
|{{Pop density|2778|0.36|sqmi|prec=1}}
| 1898
| 
|- style="background:honeyDew;"
| 54
|'''[[Lima, Pennsylvania|Lima]]'''
| CDP
| 2,745
| 1.47 sq mi
|{{Pop density|2745|1.47|sqmi|prec=1}}
|- style="background:seaShell;"
| 55
|'''[[East Lansdowne, Pennsylvania|East Lansdowne]]'''
| Borough
| 2,714
| 0.21 sq mi
|{{Pop density|2714|0.21|sqmi|prec=1}}
| 1911
| 
|- style="background:seaShell;"
| 56
|'''[[Colwyn, Pennsylvania|Colwyn]]'''
| Borough
| 2,474
| 0.26 sq mi
|{{Pop density|2474|0.26|sqmi|prec=1}}
| 1892
| 
|- style="background:seaShell;"
| 57
|'''[[Eddystone, Pennsylvania|Eddystone]]'''
| Borough
| 2,459
| 1.52 sq mi
|{{Pop density|2459|1.52|sqmi|prec=1}}
| 1888
| 1641
|- style="background:seaShell;"
| 58
|'''[[Marcus Hook, Pennsylvania|Marcus Hook]]'''
| Borough
| 2,454
| 1.62 sq mi
|{{Pop density|2454|1.62|sqmi|prec=1}}
| 1892
| 
|- style="background:seaShell;"
| 59
|'''[[Parkside, Pennsylvania|Parkside]]'''
| Borough
| 2,321
| 0.21 sq mi
|{{Pop density|2321|0.21|sqmi|prec=1}}
| 1945
| 
|- style="background:seaShell;"
| 60
|'''[[Trainer, Pennsylvania|Trainer]]'''
| Borough
| 1,976
| 1.38 sq mi
|{{Pop density|1976|1.38|sqmi|prec=1}}
| 1919
| 
|- style="background:honeyDew;"
| 61
|'''[[Haverford College, Pennsylvania|Haverford College]]''' (''partially in Montgomery County'')
| CDP
| 1,497
| 0.31 sq mi
|{{Pop density|1497|0.31|sqmi|prec=1}}
|- style="background:honeyDew;"
| 62
|'''[[Chadds Ford, Pennsylvania|Chadds Ford]]''' (''mostly in Chester County'')
| CDP
| 1,476
| 2.28 sq mi
|{{Pop density|1476|2.28|sqmi|prec=1}}
|- style="background:seaShell;"
| 63
|'''[[Millbourne, Pennsylvania|Millbourne]]'''
| Borough
| 1,212
| 0.07 sq mi
|{{Pop density|1212|0.074|sqmi|prec=1}}
| 1909
| 1682
|- style="background:seaShell;"
| 6
|'''[[Rose Valley, Pennsylvania|Rose Valley]]'''
| Borough
| 1,017
| 0.73 sq mi
|{{Pop density|1017|0.73|sqmi|prec=1}}
| 1923
| 1682
|- style="background:honeyDew;"
| 65
|'''[[Dilworthtown, Pennsylvania|Dilworthtown]]''' (''mostly in Chester County'')
| CDP
| 1,150
| 0.64 sq mi
|{{Pop density|1150|0.64|sqmi|prec=1}}
|- style="background:seaShell;"
| 66
|'''[[Rutledge, Pennsylvania|Rutledge]]'''
| Borough
| 782
| 0.14 sq mi
|{{Pop density|782|0.14|sqmi|prec=1}}
| 1887
| 1885
|- style="background:honeyDew;"
| 67
|'''[[Cheyney, Pennsylvania|Cheyney University]]''' (''mostly in Chester County'')
| CDP
| 565
| 0.30 sq mi
|{{Pop density|565|0.30|sqmi|prec=1}}
|}