- Lead
- 8,718
- Total
- 28,783
- vs nation
- R+28.8
Oklahoma 21st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 8,301
- Total
- 29,310
- vs nation
- R+32.8
- Lead
- 8,884
- Total
- 27,508
- vs nation
- R+34.4
- Lead
- 7,926
- Total
- 25,958
- vs nation
- R+34.4
- Lead
- 8,338
- Total
- 29,224
- vs nation
- R+35.8
- Lead
- 9,456
- Total
- 30,452
- vs nation
- R+28.6
- Lead
- 5,619
- Total
- 25,521
- vs nation
- R+22.5
- Lead
- 1,367
- Total
- 24,852
- vs nation
- R+14.0
Key facts
- 2024 presidential margin
- R+30.3MIT Election Lab
- Population
- 82,4892024 5-year
- Population density
- 134 / sq mi2024 5-year · TIGER/Line
- Land area
- 615 sq miTIGER/Line
- Median household income
- $46,9552024 5-year
- White (non-Hispanic)
- 72.2%2024 5-year
- Black
- 3.7%2024 5-year
- Hispanic / Latino
- 6.3%2024 5-year
- Peak Democratic margin
- D+32.8 in 1932MIT Election Lab
- Peak Republican margin
- R+49.2 in 1972MIT Election Lab
- Most similar
- State Senate District 28, KS · twin score 86.1
presidential history
Party record book
Oklahoma 21st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1908–2024 · 30 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
66.4%
8,789 votes · D+32.8 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 62.7%
Republican
Richard Nixon1972
73.6%
16,735 votes · R+49.2 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 71.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Michael Dukakis1988
10,891votes
40.5% of the vote · R+17.9 · modeled estimate
Runner-up · John Kerry, 2004 · 10,498 votes
Republican
Ronald Reagan1984
20,450votes
71.6% of the vote · R+43.9 · modeled estimate
Runner-up · George W. Bush, 2004 · 19,954 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
John W. Davis1924
+20.7pts D vs U.S.
Place R+4.5 · U.S. R+25.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · +15.0 pts
Republican
John McCain2008
+35.8pts R vs U.S.
Place R+28.5 · U.S. D+7.3 · modeled estimate
Runner-up · Mitt Romney, 2012 · +34.4 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | R | 31.0%9,247 | 69.0%20,587 | 29,834 |
With a 2024 presidential margin of R+30.3 across a population of roughly 82,000, this district has shown little recent electoral volatility, making it a stable baseline for tracking conservative turnout patterns in the state.
Across the recorded series it reached a Democratic high of 32.8 points in 1932 and a Republican high of 49.2 points in 1972. Between 2020 and 2024 the district moved 2.0 points toward the Republican candidate; the 2024 margin was 30.3 points.
A population of 82,489, a 72% non-Hispanic-white share, and a median household income of $46,955 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 28 and State Senate District 35.
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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Oklahoma 21st State Senate District. Akashic. https://akashic.app/sld-upper/40021/. Accessed May 20, 2026. License: CC BY 4.0.