electionsmcp › Missouri counties › Jefferson

Jefferson County, MO

The certified 2024 map, county by county — Jefferson in amber. Open it and every precinct inside is yours to model.

Model Jefferson County, precinct by precinct →

Missouri by certified 2024 presidential result · Jefferson County in amber · open the live map →

2024 president

Republican R+36.7

Votes cast

119,287

State

Missouri

Grain

Precinct-level

Frequently asked

How did Jefferson County vote in 2024?

R+36.7 for president — 36,965 Democratic · 80,796 Republican of 119,287 votes.

Can I model Jefferson County precinct by precinct?

Yes — open the county in the simulator and every precinct inside it is editable, with real 2024 returns as the baseline. The county rolls up live into its statewide races.

What races cover Jefferson County?

Every statewide race (U.S. Senate, Governor, the executive offices) plus its U.S. House and state-legislature districts — all modelable from the same county baseline.

Every county in Missouri

Adair Andrew Atchison Audrain Barry Barton Bates Benton Bollinger Boone Buchanan Butler Caldwell Callaway Camden Cape Girardeau Carroll Carter Cass Cedar Chariton Christian Clark Clay Clinton Cole Cooper Crawford Dade Dallas Daviess DeKalb Dent Douglas Dunklin Franklin Gasconade Gentry Greene Grundy Harrison Henry Hickory Holt Howard Howell Iron Jackson Jasper Johnson Knox Laclede Lafayette Lawrence Lewis Lincoln Linn Livingston Macon Madison Maries Marion McDonald Mercer Miller Mississippi Moniteau Monroe Montgomery Morgan New Madrid Newton Nodaway Oregon Osage Ozark Pemiscot Perry Pettis Phelps Pike Platte Polk Pulaski Putnam Ralls Randolph Ray Reynolds Ripley Saline Schuyler Scotland Scott Shannon Shelby St. Charles St. Clair St. Francois St. Louis St. Louis Ste. Genevieve Stoddard Stone Sullivan Taney Texas Vernon Warren Washington Wayne Webster Worth Wright

The races above this county

Missouri U.S. Senate · Governor · the 2026 Senate board · the 2026 House board