Editing Costa Mesa, California (section)

===2010===
At the [[2010 United States Census|2010 census]] Costa Mesa had a population of 109,960. The population density was {{convert|7,004.0|PD/sqmi|PD/km2|sp=us|adj=off}}. The racial makeup of Costa Mesa was 75,335 (68.5%) White (51.8% Non-Hispanic White),<ref name="quickfacts.census.gov">{{cite web |title= United States QuickFacts |url= http://quickfacts.census.gov/qfd/states/06/0616532.html |access-date= December 12, 2013 |archive-url= https://web.archive.org/web/20120917053137/http://quickfacts.census.gov/qfd/states/06/0616532.html |archive-date= September 17, 2012 |url-status= dead }}</ref> 1,640 (1.5%) African American, 686 (0.6%) Native American, 8,654 (7.9%) Asian, 527 (0.5%) Pacific Islander, 17,992 (16.4%) from other races, and 5,126 (4.7%) from two or more races. Hispanic or Latino of any race were 39,403 persons (35.8%).<ref>{{cite web|url=http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0616532|archive-url=https://archive.today/20140715024228/http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0616532|url-status=dead|archive-date=  July 15, 2014|title=2010 Census Interactive Population Search: CA - Costa Mesa city|publisher=U.S. Census Bureau|access-date= July 12, 2014}}</ref>

The [[United States Census Bureau|Census]] reported that 106,990 people (97.3% of the population) lived in households, 2,232 (2.0%) lived in non-institutionalized group quarters, and 738 (0.7%) were institutionalized.{{citation needed|date=June 2021}}

There were 39,946 households, 12,298 (30.8%) had children under the age of 18 living in them, 16,478 (41.3%) were [[marriage|opposite-sex married couples]] living together, 4,369 (10.9%) had a female householder with no husband present, 2,392 (6.0%) had a male householder with no wife present. There were 3,013 (7.5%) [[POSSLQ|unmarried opposite-sex partnerships]], and 281 (0.7%) [[same-sex partnerships|same-sex married couples or partnerships]]. 10,963 households (27.4%) were one person and 2,775 (6.9%) had someone living alone who was 65 or older. The average household size was 2.68. There were 23,239 families (58.2% of households); the average family size was 3.30.{{citation needed|date=June 2021}}

The age distribution was 23,682 people (21.5%) under the age of 18, 12,847 people (11.7%) aged 18 to 24, 38,211 people (34.7%) aged 25 to 44, 25,106 people (22.8%) aged 45 to 64, and 10,114 people (9.2%) who were 65 or older. The median age was 33.6 years. For every 100 females, there were 103.7 males. For every 100 females age 18 and over, there were 102.7 males.{{citation needed|date=June 2021}}

There were 42,120 housing units at an average density of 2,682.9 per square mile, of the occupied units 15,799 (39.6%) were owner-occupied and 24,147 (60.4%) were rented. The homeowner vacancy rate was 1.2%; the rental vacancy rate was 5.9%. 42,517 people (38.7% of the population) lived in owner-occupied housing units and 64,473 people (58.6%) lived in rental housing units.

During 2009–2013, Costa Mesa had a median household income of $65,830, with 15.1% of the population living below the poverty line.<ref name="quickfacts.census.gov"/>