County record · FIPS 06013
Contra Costa County, CA
A joined view of reported 2024 election administration and the 2020–2024 American Community Survey profile for California.
Population1,165,012ACS 2020–2024
Registered voters789,340100% jurisdiction coverage
Voters539,459100% jurisdiction coverage
Registered turnout68.34%Reported voters / registration
Ballot administration
Mail-ballot record
| Stage | Reported ballots | Jurisdiction coverage |
|---|---|---|
| Transmitted | 738,013 | 100% |
| Returned | 468,867 | 100% |
| Counted | 464,641 | 100% |
| Rejected | 4,226 | 100% |
Return rate63.53%
Rejection rate0.90%
A blank means the source did not provide enough information. It does not mean zero ballots.
Administrative capacity
Election infrastructure
Polling places149100% coverage
Poll workers1,209100% coverage
Drop boxes45100% coverage
Provisional ballots cast11,361100% coverage
Provisional acceptance91.30%Counted / cast where reported
Cross-state twin
Contra Costa County, CA ↔ Nassau County, NY
69.5% profile similarityPopulation1,165,0121,389,591
Median household income$127,229$146,202
Poverty8.36%5.42%
No vehicle5.21%6.77%
The closest profile among counties in other states. Similarity uses seven ACS measures and does not include vote choice.
Reported detail
Mail rejection reasons
| Reason | Ballots |
|---|---|
| Signature mismatch | 2,654 |
| Late | 1,025 |
| Missing signature | 447 |
| Already voted | 60 |
| Missing documentation | 40 |