Editing Altadena, California (section)

===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>