Union County, Iowa
Precinct data
Results by precinct
9 precincts · 5,996 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Creston Pct 2Creston Pct 2 | 422 | 1,016 | 15 | 1,453 | 29.0% | 69.9% | R+40.9 |
|---|---|---|---|---|---|---|---|
| Precinct -Creston Pct 5Creston Pct 5 | 312 | 475 | 10 | 797 | 39.1% | 59.6% | R+20.5 |
| Precinct -Creston Pct 3Creston Pct 3 | 297 | 433 | 13 | 743 | 40.0% | 58.3% | R+18.3 |
| Precinct -Creston Pct 4Creston Pct 4 | 243 | 489 | 9 | 741 | 32.8% | 66.0% | R+33.2 |
| Precinct -AftonAfton | 142 | 476 | 9 | 627 | 22.6% | 75.9% | R+53.3 |
| Precinct -LorimorLorimor | 146 | 441 | 10 | 597 | 24.5% | 73.9% | R+49.4 |
| Precinct -Creston Pct 1Creston Pct 1 | 215 | 352 | 9 | 576 | 37.3% | 61.1% | R+23.8 |
| Precinct -ArispeArispe | 61 | 212 | 2 | 275 | 22.2% | 77.1% | R+54.9 |
| Precinct -Lincoln TownshipLincoln Township | 36 | 150 | 1 | 187 | 19.3% | 80.2% | R+61.0 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −9.9% |
| 1896 | +4.9% |
| 1900 | −5.0% |
| 1904 | −31.4% |
| 1908 | −8.6% |
| 1912 | +11.1% |
| 1916 | −1.6% |
| 1920 | −32.9% |
| 1924 | −39.3% |
| 1928 | −34.2% |
| 1932 | +13.0% |
| 1936 | −8.2% |
| 1940 | −25.3% |
| 1944 | −22.9% |
| 1948 | −12.4% |
| 1952 | −38.1% |
| 1956 | −24.5% |
| 1960 | −23.8% |
| 1964 | +19.9% |
| 1968 | −20.8% |
| 1972 | −27.1% |
| 1976 | +1.4% |
| 1980 | −19.9% |
| 1984 | −10.8% |
| 1988 | +8.0% |
| 1992 | +5.6% |
| 1996 | +11.2% |
| 2000 | −8.1% |
| 2004 | −7.0% |
| 2008 | +3.7% |
| 2012 | +3.9% |
| 2016 | −27.2% |
| 2020 | −31.5% |
| 2024 | −36.1% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 32.5%1,464 | 67.5%3,035 | 4,499 |
| 2020 | R | 33.5%2,051 | 62.4%3,820 | 6,119 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 11 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 8,761 | 2,491 | 2,708 | 3,562 | 0 |
| 2010 | 8,845 | 2,238 | 3,149 | 3,458 | 0 |
| 2012 | 8,114 | 1,908 | 2,946 | 3,257 | 3 |
| 2014 | 8,017 | 1,766 | 2,851 | 3,389 | 11 |
| 2016 | 8,159 | 1,810 | 2,882 | 3,445 | 22 |
| 2018 | 8,200 | 1,800 | 2,862 | 3,493 | 45 |
| 2020 | 8,469 | 1,838 | 3,517 | 3,068 | 46 |
| 2022 | 8,416 | 1,659 | 3,514 | 3,182 | 61 |
| 2024 | 8,374 | 1,493 | 3,624 | 3,190 | 67 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−56 net domestic migration · 2025
Net −402 over 2011–2025 · gain loss
Arrivals reported $42,148 in average income, against $66,062 for residents who stayed — 36% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+28.0 on average — 8.1 points more Democratic-leaning than Union County, IA itself (R+36.1).
Where arrivals came from lean of each source
- Polk County, IA34D+10.8
- Adams County, IA26R+44.1
- Ringgold County, IA23R+51.3
- Adair County, IA22R+44.9
Where departures went households, 2022–23
- Polk County, IA50
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 | +25 |
| 2012 | +54 |
| 2013 | +2 |
| 2014 | +24 |
| 2015 | −170 |
| 2016 | −50 |
| 2017 | +72 |
| 2018 | −153 |
| 2019 | −53 |
| 2021 | −42 |
| 2022 | −127 |
| 2023 | +5 |
| 2024 | +67 |
| 2025 | −56 |
Union County's population has hovered near 12,000 for decades, and its predominantly rural, non-college workforce profile mirrors the demographic shift that has pushed its presidential margins steadily rightward since 2008.
Across the recorded series it reached a Democratic high of 19.9 points in 1964 and a Republican high of 39.3 points in 1924. Between 2020 and 2024 the county moved 4.6 points toward the Republican candidate; the 2024 margin was 36.1 points.
A population of 11,993, a 92% non-Hispanic-white share, and a median household income of $57,772 describe the county. The county's voting pattern over the last decade is most similar to that of Lucas County and Henderson 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 →
Union County, Iowa. Akashic. https://akashic.app/county/19175/. Accessed May 20, 2026. License: CC BY 4.0.