Iowa 16th 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
Lyndon B. Johnson1964
65.9%
11,267 votes · D+32.3 · modeled estimate
Runner-up · Michael Dukakis, 1988 · 58.7%
Republican
Theodore Roosevelt1904
72.4%
2,229 votes · R+55.1 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 68.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
22,200votes
58.6% of the vote · D+19.2 · modeled estimate
Runner-up · Kamala Harris, 2024 · 20,887 votes
Republican
Mitt Romney2012
15,063votes
42.7% of the vote · D+12.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 14,913 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
Michael Dukakis1988
+25.7pts D vs U.S.
Place D+17.9 · U.S. R+7.7 · modeled estimate
Runner-up · Walter Mondale, 1984 · +20.3 pts
Republican
Theodore Roosevelt1904
+35.4pts R vs U.S.
Place R+55.1 · U.S. R+19.7 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +27.0 pts
current representation
Current officeholders
DRenee HardmanState Senate · 16
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 3 House
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.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
D
55.2%17,709
44.8%14,358
32,067
2020
D
57.7%17,960
42.3%13,189
31,149
2018
D
58.0%14,654
42.0%10,592
25,246
Iowa 16th State Senate District sits in the Corn Belt. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 32.3 points in 1964 and a Republican high of 55.1 points in 1904. Between 2020 and 2024 the district moved 2.0 points toward the Republican candidate; the 2024 margin was 17.3 points.
A population of 64,223, a 76% non-Hispanic-white share, and a median household income of $88,200 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 29.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Iowa 16th State Senate District. Akashic. https://akashic.app/sld-upper/19016/. Accessed May 20, 2026. License: CC BY 4.0.
How did Iowa 16th State Senate District vote in 2024?
In 2024, Iowa 16th State Senate District voted Democratic by 17.3 points (D+17.3), carried by the Democratic candidate. Out of 36,172 votes cast, 20,887 went Democratic and 14,644 went Republican.
When did Iowa 16th State Senate District last vote Republican?
The most recent presidential election in which Iowa 16th State Senate District voted Republican was 1980.
How many people live in Iowa 16th State Senate District?
Iowa 16th State Senate District has a population of 64,223 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iowa 16th State Senate District?
Median household income in Iowa 16th State Senate District is $88,200 — above the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Iowa 16th State Senate District?
Akashic tracks 38 presidential elections in Iowa 16th State Senate District from 1876 to 2024. Of those, 19 went Democratic and 18 went Republican.