Ranking of Contra Costa, CA Cities and Places By population in 2021
Updated on June 27, 2025.
Based on the US Census Vintage data estimates, in 2021, among all Contra Costa, CA cities and places, Balance of Contra Costa County had the highest population (176.72K), followed by Concord city (124.35K), and Richmond city (115.75K).
The chart below shows the top 10 cities and places, and the table below shows the ranking of all Contra Costa cities and places.
You can see similar information for other California counties. You can also see the ranking of all cities and places in California.
Data Source: US Census Bureau (Vintage).
Ranking of Contra Costa, CA Cities and Places By population in 2021
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| Rank | City or Place | Population |
|---|---|---|
| 1 | Balance of Contra Costa County | 176720 |
| 2 | Concord city | 124353 |
| 3 | Richmond city | 115745 |
| 4 | Antioch city | 115489 |
| 5 | San Ramon city | 86265 |
| 6 | Pittsburg city | 75899 |
| 7 | Walnut Creek city | 69973 |
| 8 | Brentwood city | 64833 |
| 9 | Oakley city | 44200 |
| 10 | Danville town | 43519 |
| 11 | Martinez city | 36943 |
| 12 | Pleasant Hill city | 34379 |
| 13 | San Pablo city | 31877 |
| 14 | Hercules city | 26181 |
| 15 | El Cerrito city | 25907 |
| 16 | Lafayette city | 25297 |
| 17 | Orinda city | 19521 |
| 18 | Pinole city | 18873 |
| 19 | Moraga town | 16856 |
| 20 | Clayton city | 10983 |