state senate districtMissouri 21st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004R+16.7
2008R+10.8
2012R+21.0
2016R+34.3
2020R+34.7
2024R+35.9
net swing · 2004→2024R+19.2R+16.7 → R+35.9
vs. U.S. · 2024R+34.4R+35.9 vs R+1.5
presidential returns
2024 turnout 67.8% of 141,327 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
30,091
64,471
1,261
95,823
141,327
67.8%
2020
30,168
63,209
1,780
95,157
136,644†
69.6%
2016
25,757
55,134
4,815
85,706
130,998†
65.4%
2012
32,084
49,699
2,041
83,824
126,064†
66.5%
2008
38,325
47,829
1,912
88,066
124,380†
70.8%
2004
34,002
47,736
419
82,157
122,697†
67.0%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupMO SD 21MissouriUnited States
German23.5%21.3%12.5%
English15.0%11.9%9.5%
Irish13.1%11.8%9.4%
American6.8%6.8%5.3%
Italian3.8%3.2%4.8%
Scottish2.2%1.8%1.3%
French1.8%2.2%1.6%
Swedish1.3%——
Mexican2.7%3.2%11.3%
Puerto Rican0.3%0.4%1.8%
Spanish0.2%——
Salvadoran0.2%—0.7%
Cuban0.2%—0.7%
African American†2.4%10.0%9.9%
African0.3%0.3%0.5%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
MO SD 21
Missouri
United States
Median age
39.6
39.2
39.1
Age 18–24
8.5%
9.2%
9.2%
Age 65 and older
16.6%
17.9%
17.2%
Household economy
Measure
MO SD 21
Missouri
United States
Median household income
$80,897
$70,702
$84,427
Poverty rate
9.8%
12.6%
12.5%
Bachelor's degree or higher (25+)
31.6%
32.4%
35.6%
Languages at home
Measure
MO SD 21
Missouri
United States
Speaks a non-English language at home
6.5%
6.7%
22.3%
Spanish
3.3%
2.9%
13.6%
Religious landscape
Measure
MO SD 21
Missouri
United States
Catholic
—
12.5%
18.6%
Evangelical Protestant
—
24.1%
16.5%
Unclaimed / not counted
—
51.7%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Missouri 21st State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−16.7%
2008
−10.8%
2012
−21.0%
2016
−34.3%
2020
−34.7%
2024
−35.9%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
31.4%Harris30,091
67.3%Trump64,471
1.3%
R+35.9
R+1.2
R+34.4
95,823
R
31.7%Biden30,168
66.4%Trump63,209
1.9%
R+34.7
R+0.4
R+39.2
95,157
R
30.1%Clinton25,757
64.3%Trump55,134
5.6%
R+34.3
R+13.3
R+36.4
85,706
R
38.3%Obama32,084
59.3%Romney49,699
2.4%
R+21.0
R+10.2
R+24.9
83,824
R
43.5%Obama38,325
54.3%McCain47,829
2.2%
R+10.8
D+5.9
R+18.1
88,066
R
41.4%Kerry34,002
58.1%Bush47,736
0.5%
R+16.7
—
R+14.3
82,157
current representation
Current officeholders
RKurtis GregoryState Senate · 21
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 86% 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 47 and State Senate District 44.
Akashic
Political twins — state-senate districts
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Missouri 21st State Senate District. Akashic. https://akashic.app/sld-upper/29021/. Accessed May 20, 2026. License: CC BY 4.0.
How did Missouri 21st State Senate District vote in 2024?
In 2024, Missouri 21st State Senate District voted Republican by 35.9 points (R+35.9), carried by the Republican candidate. Out of 95,823 votes cast, 30,091 went Democratic and 64,471 went Republican.
How many people live in Missouri 21st State Senate District?
Missouri 21st State Senate District has a population of 184,062 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Missouri 21st State Senate District?
Median household income in Missouri 21st State Senate District is $80,897 — above the national median of $80,734. The Missouri state median is $70,702.
What is the political history of Missouri 21st State Senate District?
Akashic tracks 6 presidential elections in Missouri 21st State Senate District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
