Missouri 21st State Senate District
Akashic| Donald Trump ✓Republican | 67.3% | 64,471 |
|---|---|---|
| Kamala HarrisDemocratic | 31.4% | 30,091 |
| Chase OliverLibertarian | 1.3% | 1,261 |
County-level results (6 counties) — table
| County | Winner | Margin |
|---|---|---|
| Clay County, MO | Republican | R+5.6 |
| Cooper County, MO | Republican | R+45.6 |
| Howard County, MO | Republican | R+44.2 |
| Lafayette County, MO | Republican | R+48.9 |
| Ray County, MO | Republican | R+48.5 |
| Saline County, MO | Republican | R+40.4 |
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 31.4%Harris30,091 | 67.3%Trump64,471 | 1.3%Oliver1,261 | 95,823 | ||
| R | 31.7%Biden30,168 | 66.4%Trump63,209 | 1.9%Jorgensen1,780 | 95,157 | ||
| R | 30.1%Clinton25,757 | 64.3%Trump55,134 | 5.6%Johnson4,815 | 85,706 | ||
| R | 39.2%Obama32,084 | 60.8%Romney49,699 | 0.0% | 81,783 | ||
| R | 43.5%Obama38,325 | 54.3%McCain47,829 | 2.2%Nader1,912 | 88,066 |
| Year | Margin (D minus R) |
|---|---|
| 2008 | −10.8% |
| 2012 | −21.5% |
| 2016 | −34.3% |
| 2020 | −34.7% |
| 2024 | −35.9% |
State legislative officeholder from OpenStates nightly current-legislator data.
With a 2024 presidential margin of R+28, Missouri Senate District 21 ranks among the state's most one-sided constituencies, reflecting the broad rural realignment that has reshaped Missouri politics over the past two decades.
Across the recorded series it reached a Republican high of 35.9 points in 2024. Between 2020 and 2024 the district moved 1.2 points toward the Republican candidate; the 2024 margin was 35.9 points.
A population of 184,062, a 87% non-Hispanic-white share, and a median household income of $80,897 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 44 and State Senate District 20.
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Missouri 21st State Senate District. Akashic. https://akashic.app/sld-upper/29021/. Accessed May 20, 2026. License: CC BY 4.0.