Martinez city, California
Official LSAD Designation: Martinez city • Census GEOID: 0646114
• Contra Costa County
Martinez city is an incorporated city in Contra Costa County, California. According to official records from the Census (2025), Martinez city had an estimated population of 36,849 residents. Official Census Bureau geographic records classify this community under LSAD designation Martinez city (GEOID 0646114).
Local Government Administration U.S. Census Bureau GMAF
City Of Martinez
Municipal
Official Title:
City Manager
Address:
525 HENRIETTA STREET, MARTINEZ CA 94553-2394
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 | 36,849 | 2025 |
| Median Household Income | $127,355 | 2020-2024 |
| Median Home Value | $859,800 | 2020-2024 |
| Land Area | 12.64 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).