California Contra Costa County

Antioch

A city in Contra Costa County, California — population 111,605 as of 2020.

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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
2020–2024 ACS
Municipal office
Office
FINANCE DIRECTOR
Address
PO BOX 5007, ANTIOCH, CA 94531
Municipal record
Official city site Map
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