Walnut Creek is a city in Contra Costa County, California, United States, located in the East Bay region of the San Francisco Bay Area, about 16 miles (26 kilometres) east of the city of Oakland. With a total estimated population of 69,122, Walnut Creek serves as a hub for its neighboring cities because of its location at the junction of the highways from Sacramento and San Jose (I-680) and San Francisco/Oakland (SR-24) and its accessibility by BART. Its active downtown neighborhood features hundred-year-old buildings and extensive high-end retail establishments, restaurants and entertainment venues
The 2010 United States Census reported that Walnut Creek had a population of 64,173. The population density was 3,246.2 people per square mile (1,253.4/km²). The racial makeup of Walnut Creek was 50,487 (78.7 percent) White, 1,035 (1.6 percent) African American, 155 (0.2 percent) Native American, 8,027 (12.5 percent) Asian, 125 (0.2 percent) Pacific Islander, 1,624 (2.5 percent) from other races, and 2,720 (4.2 percent) from two or more races. Hispanic or Latino of any race were 5,540 persons (8.6 percent).
The Census reported that 63,171 people (98.4 percent of the population) lived in households, 176 (0.3 percent) lived in non-institutionalized group quarters, and 826 (1.3 percent) were institutionalized.
There were 30,443 households, out of which 6,363 (20.9 percent) had children under the age of 18 living in them, 13,305 (43.7 percent) were opposite-sex married couples living together, 2,071 (6.8 percent) had a female householder with no husband present, 844 (2.8 percent) had a male householder with no wife present. There were 1,286 (4.2 percent) unmarried opposite-sex partnerships, and 298 (1.0 percent) same-sex married couples or partnerships. 11,884 households (39.0 percent) were made up of individuals and 6,424 (21.1 percent) had someone living alone who was 65 years of age or older. The average household size was 2.08. There were 16,220 families(53.3 percent of all households); the average family size was 2.79.
The population was spread out with 10,719 people (16.7 percent) under the age of 18, 3,599 people (5.6 percent) aged 18 to 24, 15,137 people (23.6 percent) aged 25 to 44, 17,653 people (27.5 percent) aged 45 to 64, and 17,065 people (26.6 percent) who were 65 years of age or older. The median age was 47.9 years. For every 100 females, there were 86.4 males. For every 100 females age 18 and over, there were 83.0 males.
There were 32,681 housing units at an average density of 1,653.2 per square mile (638.3/km²), of which 20,262 (66.6 percent) were owner-occupied, and 10,181 (33.4 percent) were occupied by renters. The homeowner vacancy rate was 2.4 percent; the rental vacancy rate was 6.7 percent. 43,079 people (67.1 percent of the population) lived in owner-occupied housing units and 20,092 people (31.3 percent) lived in rental housing units.