Clayton

Clayton is a city in Contra Costa County, California, United States.

The 2010 United States Census reported that Clayton had a population of 10,897. The population density was 2,840.7 people per square mile (1,096.8/km²). The racial makeup of Clayton was 9,273 (85.1%) White, 146 (1.3%) African American, 34 (0.3%) Native American, 717 (6.6%) Asian, 16 (0.1%) Pacific Islander, 234 (2.1%) from other races, and 477 (4.4%) from two or more races. Hispanic or Latino of any race were 982 persons (9.0%).

The Census reported that 10,887 people (99.9% of the population) lived in households, 10 (0.1%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.

There were 4,006 households, out of which 1,455 (36.3%) had children under the age of 18 living in them, 2,795 (69.8%) were opposite-sex married couples living together, 301 (7.5%) had a female householder with no husband present, 112 (2.8%) had a male householder with no wife present. There were 136 (3.4%) unmarried opposite-sex partnerships, and 36 (0.9%) same-sex married couples or partnerships. 647 households (16.2%) were made up of individuals and 310 (7.7%) had someone living alone who was 65 years of age or older. The average household size was 2.72. There were 3,208 families (80.1% of all households); the average family size was 3.04.

The population was spread out with 2,662 people (24.4%) under the age of 18, 602 people (5.5%) aged 18 to 24, 2,185 people (20.1%) aged 25 to 44, 3,846 people (35.3%) aged 45 to 64, and 1,602 people (14.7%) who were 65 years of age or older. The median age was 45.0 years. For every 100 females, there were 93.4 males. For every 100 females age 18 and over, there were 90.3 males.

There were 4,086 housing units at an average density of 1,065.2 per square mile (411.3/km²), of which 4,006 were occupied, of which 3,621 (90.4%) were owner-occupied, and 385 (9.6%) were occupied by renters. The homeowner vacancy rate was 0.7%; the rental vacancy rate was 3.8%. 9,936 people (91.2% of the population) lived in owner-occupied housing units and 951 people (8.7%) lived in rental housing units.

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