County record · FIPS 29099
Jefferson County, MO
A joined view of reported 2024 election administration and the 2020–2024 American Community Survey profile for Missouri.
Population229,458ACS 2020–2024
Registered voters161,584100% jurisdiction coverage
Voters120,381100% jurisdiction coverage
Registered turnout74.50%Reported voters / registration
Ballot administration
Mail-ballot record
| Stage | Reported ballots | Jurisdiction coverage |
|---|---|---|
| Transmitted | 8,641 | 100% |
| Returned | 8,002 | 100% |
| Counted | 7,897 | 100% |
| Rejected | 105 | 100% |
Return rate92.61%
Rejection rate1.31%
A blank means the source did not provide enough information. It does not mean zero ballots.
Administrative capacity
Election infrastructure
Polling places51100% coverage
Poll workers640100% coverage
Drop boxesNot reported0% coverage
Provisional ballots cast127100% coverage
Provisional acceptance55.91%Counted / cast where reported
Cross-state twin
Jefferson County, MO ↔ Kootenai County, ID
82.5% profile similarityPopulation229,458181,996
Median household income$82,851$81,861
Poverty9.03%9.04%
No vehicle3.67%4.16%
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 |
|---|---|
| Missing signature | 54 |
| Missing witness | 38 |
| Late | 7 |
| Deceased | 4 |