Hamilton County, Iowa
Precinct data
Results by precinct
7 precincts · 7,573 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Pct 7 SoutheastPct 7 Southeast | 487 | 1,125 | 16 | 1,628 | 29.9% | 69.1% | R+39.2 |
|---|---|---|---|---|---|---|---|
| Precinct -Pct 3 WC 3Pct 3 WC 3 | 464 | 762 | 17 | 1,243 | 37.3% | 61.3% | R+24.0 |
| Precinct -Pct 6 SouthwestPct 6 Southwest | 325 | 834 | 18 | 1,177 | 27.6% | 70.9% | R+43.2 |
| Precinct -Pct 2 WC 2Pct 2 WC 2 | 482 | 649 | 9 | 1,140 | 42.3% | 56.9% | R+14.6 |
| Precinct -Pct 1 WC 1Pct 1 WC 1 | 350 | 591 | 8 | 949 | 36.9% | 62.3% | R+25.4 |
| Precinct -Pct 4 NorthwestPct 4 Northwest | 196 | 529 | 9 | 734 | 26.7% | 72.1% | R+45.4 |
| Precinct -Pct 5 NortheastPct 5 Northeast | 178 | 514 | 10 | 702 | 25.4% | 73.2% | R+47.9 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −25.1% |
| 1896 | −40.0% |
| 1900 | −47.7% |
| 1904 | −58.6% |
| 1908 | −39.9% |
| 1912 | +4.9% |
| 1916 | −44.7% |
| 1920 | −67.1% |
| 1924 | −54.0% |
| 1928 | −16.6% |
| 1932 | +37.5% |
| 1936 | +25.8% |
| 1940 | +11.5% |
| 1944 | +5.7% |
| 1948 | +1.1% |
| 1952 | −42.9% |
| 1956 | −19.3% |
| 1960 | −14.8% |
| 1964 | +24.8% |
| 1968 | −19.4% |
| 1972 | −24.0% |
| 1976 | +0.3% |
| 1980 | −24.2% |
| 1984 | −12.3% |
| 1988 | +11.7% |
| 1992 | +3.0% |
| 1996 | +4.8% |
| 2000 | −7.4% |
| 2004 | −5.7% |
| 2008 | +1.3% |
| 2012 | −2.6% |
| 2016 | −22.3% |
| 2020 | −26.6% |
| 2024 | −33.2% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 34.1%1,945 | 65.9%3,757 | 5,702 |
| 2020 | R | 37.0%2,913 | 59.5%4,679 | 7,866 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 8.4 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 11,132 | 3,258 | 3,720 | 4,149 | 5 |
| 2010 | 11,163 | 3,142 | 3,875 | 4,139 | 7 |
| 2012 | 11,086 | 3,038 | 3,804 | 4,240 | 4 |
| 2014 | 10,795 | 2,751 | 3,727 | 4,301 | 16 |
| 2016 | 10,517 | 2,525 | 4,196 | 3,757 | 39 |
| 2018 | 10,303 | 2,430 | 4,068 | 3,743 | 62 |
| 2020 | 10,386 | 2,582 | 4,588 | 3,154 | 62 |
| 2022 | 10,160 | 2,374 | 4,498 | 3,218 | 70 |
| 2024 | 10,210 | 2,140 | 4,671 | 3,334 | 65 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−95 net domestic migration · 2025
Net −1,393 over 2011–2025 · gain loss
Arrivals reported $55,793 in average income, against $94,085 for residents who stayed — 41% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+9.8 on average — 23 points more Democratic-leaning than Hamilton County, IA itself (R+33.2).
Where arrivals came from lean of each source
- Story County, IA64D+10.3
- Webster County, IA39R+31.1
- Wright County, IA26R+36.4
- Polk County, IA23D+10.8
- Boone County, IA20R+21.5
Where departures went households, 2022–23
- Story County, IA88
- Webster County, IA67
- Polk County, IA40
- Hardin County, IA24
- Wright County, IA22
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −165 |
| 2012 | −159 |
| 2013 | +16 |
| 2014 | −181 |
| 2015 | −35 |
| 2016 | −185 |
| 2017 | −39 |
| 2018 | −138 |
| 2019 | −107 |
| 2021 | −92 |
| 2022 | −40 |
| 2023 | −76 |
| 2024 | −97 |
| 2025 | −95 |
Hamilton County's agricultural economy and sparse small-town population have pushed its presidential margins steadily rightward over the past two decades, landing at R+33.2 in 2024 — well above the statewide average.
Across the recorded series it reached a Democratic high of 37.5 points in 1932 and a Republican high of 67.1 points in 1920. Between 2020 and 2024 the county moved 6.6 points toward the Republican candidate; the 2024 margin was 33.2 points.
A population of 14,886, a 84% non-Hispanic-white share, and a median household income of $72,432 describe the county. The county's voting pattern over the last decade is most similar to that of Swift County and Pope County.
The counties 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.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
Hamilton County, Iowa. Akashic. https://akashic.app/county/19079/. Accessed May 20, 2026. License: CC BY 4.0.