Diamond, California
Diamond: a city in Contra Costa County, California
About
Diamond is a city located in the county of Contra Costa in the U.S. state of California.
Quick Facts about Diamond
| State | California (United States) |
| County | Contra Costa County |
| Latitude & Longitude | 38.0216,-121.8933 |
| Time Zone | America/Los_Angeles |
| Local time | 20:52:19 (17th April 2026) |
Geography
Diamond is located at 38°1'18"N 121°53'36"W (38.0215900, -121.8932900).
Diamond map
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Nearby Schools and Colleges
Schools and campuses linked to Diamond, CA. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 117894 | Los Medanos College | Pittsburg (CA) | 94565 |
| 491950 | Contra Costa Medical Career College | Antioch (CA) | 94581-6208 |
| 382258 | Mt. Diablo Adult Education-Mt. Diablo USD | Concord (CA) | 94518-1199 |
| 491756 | Urban Barber College | Concord (CA) | 94520-2522 |
| 116712 | John F. Kennedy University | Pleasant Hill (CA) | 94523-4817 |
Nearby Transit Stations (50)
Rail and bus stations connected to Diamond, CA. Select a station to open its map and address details.
| Code | Name | Address | Type |
|---|---|---|---|
| ACA | Antioch–Pittsburg | 100 I Street | RAIL |
| MTZ | Martinez station | 601 Marina Vista Ave. | RAIL |
| RVT | Rio Vista, CA | 28 South Front Street | BUS |
| SUI | Suisun–Fairfield station | 177 Main Street | RAIL |
| VMW | Marine World (Seasonal), Vallejo, California | Highway 37 and Fairgrounds Drive | BUS |
Closest post offices linked to Diamond.
| Post Office Name | City | ZIP |
|---|---|---|
| Pittsburg Post Office | Pittsburg (CA) | 94565 |
Other places with the same name (2)
- Diamond, Illinois village in Illinois, USA with a population of 2,484 people.
- Diamond, Missouri city in Newton County, Missouri, United States with a population of 909 people.
Other cities in Contra Costa County
Cities, towns, neighborhoods & other populated places in Contra Costa County , CA. (more)
| City Name | Population | Title |
|---|---|---|
| Concord | 128,544 | The third most populous city in Contra Costa County, California. |
| Antioch | 111,605 | The most populous city in Contra Costa County, California. |
| Richmond | 110,038 | The most populous city in Contra Costa County, California. |
| San Ramon | 82,865 | A city in Contra Costa County, California. |
| Pittsburg | 72,622 | A city in Contra Costa County, California. |
| Walnut Creek | 69,936 | The fifth most populous city in Contra Costa County, California. |
| Brentwood | 65,017 | The most populous city in Contra Costa County, California. |
| Danville | 44,883 | Town in Contra Costa County, California |
| Oakley | 42,710 | A city in Contra Costa County, California. |
| Martinez | 38,027 | City in Contra Costa County, California, USA |
| Pleasant Hill | 34,781 | City in Contra Costa County, California, USA |
| San Pablo | 30,779 | City in Contra Costa County, California, United States |
| Hercules | 26,221 | City in western Contra Costa County, California |
| Lafayette | 25,992 | City in California |
| El Cerrito | 25,403 | City in Contra Costa County, California, United States |
| Bay Point | 21,534 | Census designated place in California |