Antioch, CA Profile: Facts & Data


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Antioch, California - Basic Facts

The City of Antioch had a population of 119,572 as of July 1, 2023. Antioch ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for Antioch is located at latitude 38.0049 and longitude -121.8058 in Contra Costa County. The formal boundaries for the City of Antioch encompass a land area of 28.33 sq. miles and a water area of 0.7 sq. miles. Contra Costa County is in the Pacific time zone (GMT -8).

The City of Antioch has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Antioch is located within Antioch-Pittsburg CCD of Contra Costa County.

Jump to... (On This Page!)
  1. Antioch 2023 Demographic Data
  2. Growth Rates for Antioch (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. California Research Tools (Easy Tools & Current Data)
  3. California Data Comparison Tool - 2023 Demographics

Antioch, CA Data & Demographics (As of July 1, 2023)


Total Population 119,572 (100%)
Population in Households 118,890 (99.4%)
Population in Families 102,986 (86.1%)
Population in Group Quarters1 682 ( 0.6%)
Population Density 4,099
Diversity Index2 89


Median Household Income $88,536
Average Household Income $119,651
% of Income for Mortgage4 39%
Per Capita Income $36,806
Wealth Index5 112
Socioeconomic Status Index6 Low (42.0)


Total HU (Housing Units) 38,055 (100%)
Owner Occupied HU 22,893 (60.2%)
Renter Occupied HU 13,879 (36.5%)
Vacant Housing Units 1,283 ( 3.4%)
Median Home Value $579,051
Average Home Value $651,127
Housing Affordability Index3 63


Total Households 36,772
Average Household Size 3.23
Family Households 28,498
Average Family Size 4.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 1.13% 0.26%
Households 1.05% 0.22%
Families   0.24%
Median Household Income   3.19%
Per Capita Income   3.08%
Owner Occupied HU   0.55%

Antioch, CA - Peer Comparisons by Rank and Percentile

The table below compares Antioch to the other 1,611 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 54 97th
Population Density # 326 80th
Median Household Income # 599 63rd
Housing Affordability Index # 969 60th
Per Capita Income # 876 46th
Diversity Index # 9 100th

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.

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