California Contra Costa County
Antioch
A city in Contra Costa County, California — population 111,605 as of 2020.
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Today
91°F
Mostly Sunny4% precip
Tonight
63°F
Partly Cloudy1% precip
Tuesday
90°F
Mostly Sunny
Tuesday Night
64°F
Partly Cloudy
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Antioch by the numbers
Population
111,605Population figure, 2020
Households & income
- Area
- 29.17 sq mi (75.55 km²), 0.77 sq mi water
- Median age
- 38.4
- Households
- 37,381
- Persons per household
- 3.1
- Median household income
- $97,465
- Median house value
- $629,700
Municipal office
- Office
- FINANCE DIRECTOR
- Address
- PO BOX 5007, ANTIOCH, CA 94531