Editing Altadena, California (section)

==Demographics==
{{US Census population
|1960= 40568
|1970= 42415
|1980= 40983
|1990= 42658
|2000= 42610
|2010= 42777
|2020= 42846
|align-fn=center
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/programs-surveys/decennial-census/decade.html|title=Decennial Census by Decade|website=[[United States Census Bureau]]|access-date=}}</ref><br>1860–1870<ref name=1870CensusCA1>{{Cite web|title= 1870 Census of Population - Population of Civil Divisions less than Counties - California - Almeda County to Sutter County |url=https://www2.census.gov/library/publications/decennial/1870/population/1870a-12.pdf|website=[[United States Census Bureau]]}}</ref><ref name=1870CensusCA2>{{Cite web|title= 1870 Census of Population - Population of Civil Divisions less than Counties - California - Tehama County to Yuba County  |url=https://www2.census.gov/library/publications/decennial/1870/population/1870a-13.pdf|website=[[United States Census Bureau]]}}</ref> 1880-1890<ref name=1890CensusCA>{{Cite web|title= 1890 Census of Population - Population of California by Minor Civil Divisions |url=https://www2.census.gov/library/publications/decennial/1890/bulletins/demographics/134-population-of-ca.pdf|website=[[United States Census Bureau]]}}</ref><br> 1900<ref name=1900CensusCA>{{Cite web|title= 1900 Census of Population - Population of California by Counties and Minor Civil Divisions |url=https://www2.census.gov/library/publications/decennial/1900/bulletins/demographic/10-population-ca.pdf|website=[[United States Census Bureau]]}}</ref> 1910<ref name=1910CensusCA>{{Cite web|title= 1910 Census of Population - Supplement for California |url=https://www2.census.gov/library/publications/decennial/1910/abstract/supplement-ca.pdf|website=[[United States Census Bureau]]}}</ref> 1920<ref name=1920CensusCA>{{Cite web|title= 1920 Census of Population - Number of Inhabitants - California |url=https://www2.census.gov/library/publications/decennial/1920/bulletins/demographics/population-ca-number-of-inhabitants.pdf|website=[[United States Census Bureau]]}}</ref><br> 1930<ref name=1930CensusCA>{{Cite web|title= 1930 Census of Population - Number and Distribution of Inhabitants - California |url=https://www2.census.gov/library/publications/decennial/1930/population-volume-1/03815512v1ch03.pdf|website=[[United States Census Bureau]]}}</ref> 1940<ref name=1940CensusCA>{{Cite web|title= 1940 Census of Population - Number of Inhabitants - California |url=https://www2.census.gov/library/publications/decennial/1940/population-volume-1/33973538v1ch03.pdf|website=[[United States Census Bureau]]}}</ref> 1950<ref name=1950CensusCA>{{Cite web|title= 1950 Census of Population - Number of Inhabitants - California |url=https://www2.census.gov/library/publications/decennial/1950/population-volume-1/vol-01-08.pdf|website=[[United States Census Bureau]]}}</ref><br> 1960<ref name=1960CensusCA>{{Cite web|title= 1960 Census of Population - General population Characteristics - California |url=https://www2.census.gov/library/publications/decennial/1960/population-volume-1/vol-01-06-d.pdf|website=[[United States Census Bureau]]}}</ref> 1970<ref name=1970CensusCA>{{Cite web|title= 1970 Census of Population - Number of Inhabitants - California |url=https://www2.census.gov/prod2/decennial/documents/1970a_ca1-01.pdf|website=[[United States Census Bureau]]}}</ref> 1980<ref name=1980CensusCA>{{Cite web|title= 1980 Census of Population - Number of Inhabitants - California |url=https://www2.census.gov/prod2/decennial/documents/1980a_caAB-01.pdf|website=[[United States Census Bureau]]}}</ref><br> 1990<ref name=1990CensusCA>{{Cite web|title= 1990 Census of Population - Population and Housing Unit Counts - California |url=https://www2.census.gov/prod2/cen1990/cph2/cph-2-6.pdf|website=[[United States Census Bureau]]}}</ref>
2000<ref name=2000CensusCA>{{Cite web|title= 2000 Census of Population - Population and Housing Unit Counts - California |url=https://www2.census.gov/library/publications/2003/dec/phc-3-6.pdf|website=[[United States Census Bureau]]}}</ref> 2010<ref name=2010CensusCA>{{Cite web|title= 2010 Census of Population - Population and Housing Unit Counts - California |url=https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-6.pdf|website=[[United States Census Bureau]]}}</ref><br> 2020<ref name=2020CensusP2/>
}}

Altadena first appeared as an unincorporated community in the [[1960 U.S. Census]];<ref name=1960CensusCA/> and as a [[census-designated place]] in the [[1980 U.S. Census]].<ref name=1980CensusCA/>

===2020===
{| class="wikitable" style="text-align:center;"
|+'''Altadena CDP, California – Racial and ethnic composition'''<br><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Altadena CDP, California|url=https://data.census.gov/table?g=160XX00US0601290&tid=DECENNIALSF12000.P004|website=[[United States Census Bureau]] |access-date= }}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Altadena CDP, California|url=https://data.census.gov/cedsci/table?q=p2&g=160XX00US0601290&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!{{partial|Pop 2020}}<ref name=2020CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Altadena CDP, California|url=https://data.census.gov/cedsci/table?q=p2&g=160XX00US0601290&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|16,848
|17,231
|style='background: #ffffe6; |17,900
|39.54%
|40.28%
|style='background: #ffffe6; |41.78%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|13,112
|9,816
|style='background: #ffffe6; |7,136
|30.77%
|22.95%
|style='background: #ffffe6; |16.65%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|117
|85
|style='background: #ffffe6; |46
|0.27%
|0.20%
|style='background: #ffffe6; |0.11%
|-
|[[Asian Americans|Asian]] alone (NH)
|1,761
|2,231
|style='background: #ffffe6; |2,919
|4.13%
|5.22%
|style='background: #ffffe6; |6.81%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|49
|65
|style='background: #ffffe6; |47
|0.11%
|0.15%
|style='background: #ffffe6; |0.11%
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|151
|187
|style='background: #ffffe6; |293
|0.35%
|0.44%
|style='background: #ffffe6; |0.68%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|1,882
|1,660
|style='background: #ffffe6; |2,334
|4.42%
|3.88%
|style='background: #ffffe6; |5.45%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|8,690
|11,502
|style='background: #ffffe6; |12,171
|20.39%
|26.89%
|style='background: #ffffe6; |28.41%
|-
|'''Total'''
|'''42,610'''
|'''42,777'''
|style='background: #ffffe6; |'''42,846'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

The [[2020 United States census]]<ref>{{Cite web|url=https://www.census.gov/quickfacts/altadenacdpcalifornia|title=2020 Census Interactive Population Search: CA&nbsp;— Altadena CDP|publisher=U.S. Census Bureau|access-date=July 12, 2014|archive-url=https://web.archive.org/web/20150403025902/http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0601290|archive-date=April 3, 2015|url-status=dead}}</ref> reported that Altadena had a population of 42,846. The [[Race and ethnicity in the United States census|racial makeup]] of Altadena in the year 2020 was (53.2%) White (41.2% Non-Hispanic White),<ref name=quickfacts /> (19.7%) African American, (0.6%) Native American, (5.2%) Asian, (0.1%) Pacific Islander, and (6.9%) from two or more races. Hispanic or Latino residents of any race were 29.5% of the population.

===2010===
The [[2010 United States census]]<ref>{{Cite web|url=https://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0601290|title=2010 Census Interactive Population Search: CA&nbsp;— Altadena CDP|publisher=U.S. Census Bureau|access-date=July 12, 2014|archive-url=https://web.archive.org/web/20150403025902/http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0601290|archive-date=April 3, 2015|url-status=dead}}</ref> reported that Altadena had a population of 42,777. The population density was {{Convert|4,900.4|PD/sqmi|PD/km2|sp=us|adj=off}}. The [[Race and ethnicity in the United States census|racial makeup]] of Altadena in the year 2010 was 22,569 (52.8%) White (40.3% Non-Hispanic White),<ref name=quickfacts /> 10,136 (23.7%) African American, 300 (0.7%) Native American, 2,307 (5.4%) Asian, 71 (0.2%) Pacific Islander, 4,852 (11.3%) from other races, and 2,542 (5.9%) from two or more races. There were 11,502 Hispanic or Latino residents, of any race (26.9%).

The Census reported that 42,276 people (98.8% of the population) lived in households, 234 (0.5%) lived in non-institutionalized group quarters, and 267 (0.6%) were institutionalized.

There were 15,212 households, out of which 5,170 (34.0%) had children under the age of 18 living in them, 7,684 (50.5%) were [[marriage|opposite-sex married couples]] living together, 2,210 (14.5%) had a female householder with no husband present, 814 (5.4%) had a male householder with no wife present. There were 661 (4.3%) [[POSSLQ|unmarried opposite-sex partnerships]], and 271 (1.8%) [[Domestic partnership|same-sex married couples or partnerships]]. 3,489 households (22.9%) were made up of individuals, and 1,318 (8.7%) had someone living alone who was 65 years of age or older. The average household size was 2.78. There were 10,708 [[Family (US Census)|families]] (70.4% of all households); the average family size was 3.26.

The age distribution of the city's population was as follows: 9,507 people (22.2%) were under the age of 18, 3,286 (7.7%) aged 18 to 24, 10,622 (24.8%) aged 25 to 44, 13,298 (31.1%) aged 45 to 64, and 6,064 (14.2%) who were 65 years of age or older. The median age was 41.8 years. For every 100 females, there were 93.1 males. For every 100 females age 18 and over, there were 89.2 males.

There were 15,947 housing units at an average density of {{convert|1,826.8|/sqmi|/km2|sp=us|adj=off}}, of which 10,889 (71.6%) were owner-occupied, and 4,323 (28.4%) were occupied by renters. The homeowner vacancy rate was 0.9%; the rental vacancy rate was 4.9%. 30,319 people (70.9% of the population) lived in owner-occupied housing units and 11,957 people (28.0%) lived in rental housing units.

According to the 2010 United States Census, Altadena had a median household income of $82,895, with 10.7% of the population living below the federal poverty line.<ref name=quickfacts>{{cite web|title=State & County QuickFacts: Altadena CDP, California |url=http://quickfacts.census.gov/qfd/states/06/0601290.html |url-status=dead |archive-url=https://web.archive.org/web/20120701234448/http://quickfacts.census.gov/qfd/states/06/0601290.html |archive-date=July 1, 2012 }}</ref>

===2000===
As of the [[2000 United States census]],<ref name="GR2">{{Cite web|url=https://www.census.gov |publisher=[[United States Census Bureau]] |access-date=January 31, 2008 |title=U.S. Census website }}</ref> there were 42,610 people, 14,780 households, and 10,671 families residing in the CDP. The population density was {{Convert|4,898.9|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 15,250 housing units at an average density of {{Convert|1,753.3|/sqmi|/km2|sp=us|adj=off}}. The [[Race and ethnicity in the United States census|racial makeup]] of the CDP in the year 2000 was 47.30% White or European American, 31.42% Black or African American, 0.58% Native American, 4.24% Asian or Asian American, 0.13% Pacific Islander, 10.19% from other races, and 6.14% from two or more races. 20.39% of the population were [[Hispanic and Latino Americans|Hispanic]] or Latino of any race.

There were 14,780 households, out of which 34.1% had children under the age of 18 living with them, 52.3% were [[Marriage|married couples]] living together, 15.2% had a female householder with no husband present, and 27.8% were non-families. 21.8% of all households were made up of individuals, and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.29.

In the CDP, 26.6% of the population was under the age of 18, 6.4% was from 18 to 24, 30.1% from 25 to 44, 24.6% from 45 to 64, and 12.3% was 65 years of age or older. The median age was 38 years. For every 100 females, there were 91.8 males. For every 100 females age 18 and over, there were 86.6 males.

The median income for a household in the CDP was $60,549, and the median income for a family was $66,800 (these figures had risen to $77,020 and $86,778 respectively as of a 2007 estimate). Males had a median income of $49,098 versus $38,054 for females. The [[per capita income]] for the CDP was $27,604. About 7.4% of families and 10.6% of the population were below the [[Poverty threshold|poverty line]], including 14.1% of those under age 18 and 8.3% of those age 65 or over.