- Lead
- 18,210
- Total
- 34,753
- vs nation
- D+53.9
Iowa 45th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 20,239
- Total
- 33,739
- vs nation
- D+55.5
- Lead
- 17,712
- Total
- 34,127
- vs nation
- D+49.8
- Lead
- 17,096
- Total
- 33,200
- vs nation
- D+47.6
- Lead
- 18,262
- Total
- 32,302
- vs nation
- D+49.3
- Lead
- 13,075
- Total
- 28,222
- vs nation
- D+48.8
- Lead
- 9,405
- Total
- 22,658
- vs nation
- D+41.0
- Lead
- 9,264
- Total
- 19,909
- vs nation
- D+38.0
Key facts
- 2024 presidential margin
- D+52.4MIT Election Lab
- Population
- 63,9872024 5-year
- Population density
- 2,806 / sq mi2024 5-year · TIGER/Line
- Land area
- 22.8 sq miTIGER/Line
- Median household income
- $55,5292024 5-year
- White (non-Hispanic)
- 72.1%2024 5-year
- Black
- 9.6%2024 5-year
- Hispanic / Latino
- 7.6%2024 5-year
- Peak Democratic margin
- D+60.0 in 2020MIT Election Lab
- Most similar
- State Senate District 25, IA · twin score 91.7
presidential history
Party record book
Iowa 45th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Joe Biden2020
79.0%
26,637 votes · D+60.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 77.3%
Republican
Dwight D. Eisenhower1952
47.9%
3,669 votes · D+3.8 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 46.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
26,637votes
79.0% of the vote · D+60.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 26,121 votes
Republican
Donald Trump2024
7,911votes
22.8% of the vote · D+52.4 · modeled estimate
Runner-up · Mitt Romney, 2012 · 7,671 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
George McGovern1972
+58.9pts D vs U.S.
Place D+35.7 · U.S. R+23.2 · modeled estimate
Runner-up · Joe Biden, 2020 · +55.5 pts
Republican
Dwight D. Eisenhower1952
−14.6pts R vs U.S.
Place D+3.8 · U.S. R+10.8 · modeled estimate
Runner-up · Alf Landon, 1936 · −14.8 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.
Iowa 45th State Senate District sits in the Corn Belt. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 60.0 points in 2020. Between 2020 and 2024 the district moved 7.6 points toward the Republican candidate; the 2024 margin was 52.4 points.
A population of 63,987, a 72% non-Hispanic-white share, and a median household income of $55,529 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 25 and State Senate District 26.
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 →
Iowa 45th State Senate District. Akashic. https://akashic.app/sld-upper/19045/. Accessed May 20, 2026. License: CC BY 4.0.