Editing Fountain Valley, California (section)

===2010===
The [[2010 United States census]]<ref>{{cite web|url=http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0625380|archive-url=https://archive.today/20140715025014/http://www.census.gov/2010census/popmap/ipmtext.php?fl=06:0625380|url-status=dead|archive-date=July 15, 2014|title=2010 Census Interactive Population Search: CA - Fountain Valley city|publisher=U.S. Census Bureau|access-date=July 12, 2014}}</ref> reported that Fountain Valley had a population of 55,313. The population density was {{convert|6,124.7|PD/sqmi|PD/km2|sp=us|adj=off}}. The racial makeup of Fountain Valley was 31,225 (56.5%) [[White (U.S. Census)|White]] (49.2% Non-Hispanic White),<ref name="quickfacts.census.gov">{{cite web|url=http://quickfacts.census.gov/qfd/states/06/0625380.html|url-status=dead|archive-url=https://web.archive.org/web/20120712180846/http://quickfacts.census.gov/qfd/states/06/0625380.html|archive-date=July 12, 2012|title=State & County QuickFacts}}</ref> 510 (0.9%) [[African American (U.S. Census)|African American]],<ref name="quickfacts.census.gov"/> 229 (0.4%) [[Native American (U.S. Census)|Native American]], 18,418 (33.3%) [[Asian (U.S. Census)|Asian]], 171 (0.3%) [[Pacific Islander (U.S. Census)|Pacific Islander]], 2,445 (4.4%) from [[Race (United States census)|other races]], and 2,315 (4.2%) from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 7,250 persons (13.1%).

The Census reported that 54,876 people (99.2% of the population) lived in households, 257 (0.5%) lived in non-institutionalized group quarters, and 180 (0.3%) were institutionalized.

There were 18,648 households, out of which 6,341 (34.0%) had children under the age of 18 living in them, 11,142 (59.7%) were [[marriage|opposite-sex married couples]] living together, 2,102 (11.3%) had a female householder with no husband present, 970 (5.2%) had a male householder with no wife present. There were 646 (3.5%) [[POSSLQ|unmarried opposite-sex partnerships]], and 108 (0.6%) [[same-sex partnerships|same-sex married couples or partnerships]]. 3,451 households (18.5%) were made up of individuals, and 1,772 (9.5%) had someone living alone who was 65 years of age or older. The average household size was 2.94. There were 14,214 [[family (U.S. Census)|families]] (76.2% of all households); the average family size was 3.34.

The population was spread out, with 11,643 people (21.0%) under the age of 18, 4,624 people (8.4%) aged 18 to 24, 13,310 people (24.1%) aged 25 to 44, 16,020 people (29.0%) aged 45 to 64, and 9,716 people (17.6%) who were 65 years of age or older. The median age was 42.6 years. For every 100 females, there were 94.9 males. For every 100 females age 18 and over, there were 92.2 males.

There were 19,164 housing units at an average density of {{convert|2,122.0|/sqmi|/km2|sp=us|adj=off}}, of which 13,458 (72.2%) were owner-occupied, and 5,190 (27.8%) were occupied by renters. The homeowner vacancy rate was 0.8%; the rental vacancy rate was 3.8%. 40,718 people (73.6% of the population) lived in owner-occupied housing units and 14,158 people (25.6%) lived in rental housing units.

According to the 2010 United States census, Fountain Valley had a median household income of $81,212, with 6.7% of the population living below the federal poverty line.<ref name="quickfacts.census.gov"/>