County Contra Costa County, California - Population, Income & Demographics

The median income of households in Contra Costa County, California was $125,727. An estimated 3.3% of households had income below $10,000 a year and 28.5% had income of $200,000 or more.

An estimated 81% of households received earnings. An estimated 30.2% of households received Social Security and an estimated 26.9 % of households received retirement income other than Social Security. The average income from Social Security was $25,880. These income sources are not mutually exclusive; that is, some households received income from more than one source.

In 2019-2023, 8.3 % of people were in poverty. An estimated 10% of children under 18 were below the poverty level, compared with 7.3% of people 65 years old and over. An estimated 7.9% of people 18 to 64 years were below the poverty level.

In 2019-2023, 7.7 % of households received SNAP (the Supplemental Nutrition Assistance Program). An estimated 49.8% of households that received SNAP had children under 18, and 44.4% of households that received SNAP had one or more people 60 years and over. An estimated 32.5% of all households receiving SNAP were families with a female householder and no spouse present.

Among the civilian noninstitutionalized population in Contra Costa County, California in 2019-2023, 95.2% had health insurance coverage and 4.8% did not have health insurance coverage. Private coverage was 74% and public coverage was 33.8%, respectively. The percentage of children under the age of 19 with no health insurance coverage was 2.7%.

In 2019-2023, Contra Costa County, California had a total population of 1,161,458 - 590,288 (50.8%) females and 571,170 (49.2%) males. The median age was 40.3 years. An estimated 22.2% of the population was under 18 years, 31.9% was 19 to 44 years, 26.9% was 45 to 64 years, and 16.7 % was 65 years and older.

In 2019-2023, there were 411,662 households in Contra Costa County, California. The average household size was 2.79 people.

Married-couple households made up 54.1% of the households in Contra Costa County, California while cohabiting couple households made up 6.8% of households. Female householders with no spouse or partner present were 24.6% of all households, while 14.5% of households had male householders with no spouse or partner present. Some households had one person, as 9.3% of households were male householders living alone, and 12.7% were female householders living alone, for a total of 22% of all households.

In Contra Costa County, California, 35.2% of all households had one or more people under the age of 18; 33.6% of all households had one or more people 65 years and over.

In 2019-2023, an estimated 73.8% of the people living in Contra Costa County, California were U.S. natives. 55.8% of the Contra Costa County, California population were living in the state where they were born.

Approximately 26.2% of Contra Costa County, California residents in 2019-2023 were foreign-born. 58.3% of foreign-born were naturalized U.S. citizens and an estimated 76 % entered the country before the year 2010.

Foreign-born residents of Contra Costa County, California come from different parts of the world. The bar graph below displays the percentage of foreign-born from each world region of birth in 2019-2023 for Contra Costa County, California.

Among people at least five years old living in Contra Costa County, California in 2019-2023, 37 % spoke a language other than English at home. Spanish was spoken by 19% of people at least five years old; 13.8% reported that they did not speak English "very well."

In 2019-2023, 89.5 % of the people at least one year old living in Contra Costa County, California were living in the same house one year earlier.

In 2019-2023, 89.6 % of people 25 years and over had at least graduated from high school and 44.9% had a bachelor's degree or higher. An estimated 10.4% did not complete high school.

The total school enrollment in Contra Costa County, California was 288,485 in 2019-2023. Nursery school enrollment was 16,359 and kindergarten through 12th grade enrollment was 194,744. College or graduate school enrollment was 77,382.

In Contra Costa County, California, among the civilian noninstitutionalized population in 2019-2023, 11.2 % reported a disability. The likelihood of having a disability varied by age - from 3.6% of people under 18 years old, to 8.7% of people 18 to 64 years old, and to 30.7% of those 65 and over.

In Contra Costa County, California, 61.2 % of the population 16 and over were employed; 34.9% were not currently in the labor force.

An estimated 77.7% of the people employed were private wage and salary workers; 14.6% were federal, state, or local government workers; and 7.5 % were self-employed in their own (not incorporated) business.

In 2019-2023, the civilian employed population 16 years and older in Contra Costa County, California worked in the following industries:

An estimated 60.8% of Contra Costa County, California workers drove to work alone in 2019-2023, and 9.7% carpooled. Among those who commuted to work, it took them on average 36 minutes to get to work.

In 2019-2023, Contra Costa County, California had a total of 426,585 housing units. Of these housing units, 76.2% were single-family houses either not attached to any other structure or attached to one or more structures (commonly referred to as "townhouses" or "row houses"). 22.3% of the housing units were located in multi-unit structures, or those buildings that contained two or more apartments. 1.5% were mobile homes, while any remaining housing units were classified as "other," which included boats, recreational vehicles, vans, etc.

5.9% of the housing inventory was comprised of houses built since 2010, while 4.2% of the houses were first built in 1939 or earlier. The median number of rooms in all housing units in Contra Costa County, California was 5.7 rooms, and of these housing units 66.6% had three or more bedrooms.

In 2019-2023, Contra Costa County, California had 411,662 housing units that were occupied or had people living in them, while the remaining 14,923 were vacant. Of the occupied housing units, the percentage of these houses occupied by owners (also known as the homeownership rate) was 67.7% while renters occupied 32.3%. The average household size of owner-occupied houses was 2.82 and in renter-occupied houses it was 2.73.

8.7% of householders of these occupied houses had moved into their house since 2021, while 11% moved into their house in 1989 or earlier. Households without a vehicle available for personal use comprised 5.1% and another 29.3% had three or more vehicles available for use.

The following chart provides the primary fuel used to heat houses in Contra Costa County, California:

In 2019-2023, the median property value for owner-occupied houses in Contra Costa County, California was $830,800.

Of the owner-occupied households, 71.7 % had a mortgage. 28.3% owned their houses "free and clear," that is without a primary mortgage or loan on the house. The median monthly housing costs for owners with a mortgage was $3,337 and for owners without a mortgage it was $955.

For renter-occupied houses, the median gross rent for Contra Costa County, California was $2,322. Gross rent includes the monthly contract rent and any monthly payments made for electricity, gas, water and sewer, and any other fuels to heat the house.