Antioch city, California
Official LSAD Designation: Antioch city • Census GEOID: 0602252
• Contra Costa County
Antioch city is an incorporated city in Contra Costa County, California. According to official records from the Census (2025), Antioch city had an estimated population of 118,958 residents. Official Census Bureau geographic records classify this community under LSAD designation Antioch city (GEOID 0602252).
Local Government Administration U.S. Census Bureau GMAF
City Of Antioch
Municipal
Official Title:
Finance Director
Address:
PO BOX 5007, ANTIOCH CA 94531-5007
County Of Contra Costa
County
Official Title:
Chairman
Address:
651 PINE ST, RM 108A, MARTINEZ CA 94553-1229
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 118,958 | 2025 |
| Median Household Income | $97,465 | 2020-2024 |
| Median Home Value | $629,700 | 2020-2024 |
| Land Area | 29.18 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).