Clayton County, Iowa
Precinct data
Results by precinct
12 precincts · 9,381 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -JeffersonJefferson | 525 | 904 | 19 | 1,448 | 36.3% | 62.4% | R+26.2 |
|---|---|---|---|---|---|---|---|
| Precinct -Giard-MononaGiard-Monona | 365 | 1,001 | 11 | 1,377 | 26.5% | 72.7% | R+46.2 |
| Precinct -Boardman-Highland-ReadBoardman-Highland-Read | 505 | 716 | 19 | 1,240 | 40.7% | 57.7% | R+17.0 |
| Precinct -MendonMendon | 389 | 557 | 11 | 957 | 40.6% | 58.2% | R+17.6 |
| Precinct -CassCass | 263 | 590 | 8 | 861 | 30.5% | 68.5% | R+38.0 |
| Precinct -Clayton-GarnavilloClayton-Garnavillo | 192 | 494 | 11 | 697 | 27.5% | 70.9% | R+43.3 |
| Precinct -Elk-Mallory-VolgaElk-Mallory-Volga | 136 | 446 | 8 | 590 | 23.1% | 75.6% | R+52.5 |
| Precinct -Farmersburg-WagnerFarmersburg-Wagner | 161 | 351 | 4 | 516 | 31.2% | 68.0% | R+36.8 |
| Precinct -Cox Creek-SperryCox Creek-Sperry | 142 | 339 | 5 | 486 | 29.2% | 69.8% | R+40.5 |
| Precinct -Buena Vista-MillvilleBuena Vista-Millville | 144 | 315 | 6 | 465 | 31.0% | 67.7% | R+36.8 |
| Precinct -Grand Meadow-MarionGrand Meadow-Marion | 106 | 289 | 4 | 399 | 26.6% | 72.4% | R+45.9 |
| Precinct -LodomilloLodomillo | 89 | 253 | 3 | 345 | 25.8% | 73.3% | R+47.5 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +15.2% |
| 1896 | −6.2% |
| 1900 | −7.6% |
| 1904 | −11.6% |
| 1908 | +4.3% |
| 1912 | +28.7% |
| 1916 | −16.6% |
| 1920 | −56.7% |
| 1924 | −26.0% |
| 1928 | −23.0% |
| 1932 | +32.5% |
| 1936 | +14.0% |
| 1940 | −19.9% |
| 1944 | −15.7% |
| 1948 | −2.9% |
| 1952 | −34.5% |
| 1956 | −19.6% |
| 1960 | −16.5% |
| 1964 | +17.8% |
| 1968 | −22.1% |
| 1972 | −23.0% |
| 1976 | −11.6% |
| 1980 | −19.7% |
| 1984 | −18.5% |
| 1988 | +5.8% |
| 1992 | +7.6% |
| 1996 | +16.4% |
| 2000 | +2.4% |
| 2004 | +4.6% |
| 2008 | +17.2% |
| 2012 | +7.0% |
| 2016 | −22.6% |
| 2020 | −28.8% |
| 2024 | −34.4% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 34.2%2,512 | 65.8%4,839 | 7,351 |
| 2020 | R | 36.1%3,434 | 61.4%5,845 | 9,518 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 13 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 12,619 | 4,064 | 3,320 | 5,233 | 2 |
| 2010 | 12,367 | 3,814 | 3,412 | 5,138 | 3 |
| 2012 | 12,448 | 3,678 | 3,486 | 5,279 | 5 |
| 2014 | 12,320 | 3,555 | 3,484 | 5,259 | 22 |
| 2016 | 12,193 | 3,646 | 3,678 | 4,833 | 36 |
| 2018 | 12,123 | 3,391 | 3,802 | 4,871 | 59 |
| 2020 | 12,193 | 3,464 | 4,231 | 4,424 | 74 |
| 2022 | 12,210 | 3,130 | 4,645 | 4,349 | 86 |
| 2024 | 12,441 | 2,750 | 5,473 | 4,134 | 84 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−99 net domestic migration · 2025
Net −605 over 2011–2025 · gain loss
Arrivals reported $55,578 in average income, against $75,779 for residents who stayed — 27% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+21.4 on average — 13 points more Democratic-leaning than Clayton County, IA itself (R+34.4).
Where arrivals came from lean of each source
- Delaware County, IA32R+39.5
- Fayette County, IA32R+30.4
- Dubuque County, IA29R+8.6
- Allamakee County, IA28R+34.3
- Crawford County, WI25R+13.8
- Linn County, IA21D+9.9
Where departures went households, 2022–23
- Dubuque County, IA45
- Delaware County, IA41
- Allamakee County, IA34
- Fayette County, IA32
- Crawford County, WI27
- Linn 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 | −35 |
| 2012 | −99 |
| 2013 | −144 |
| 2014 | −56 |
| 2015 | −43 |
| 2016 | −67 |
| 2017 | −6 |
| 2018 | −107 |
| 2019 | +11 |
| 2021 | +67 |
| 2022 | +26 |
| 2023 | −48 |
| 2024 | −5 |
| 2025 | −99 |
Clayton's rugged Driftless Area landscape anchors a rural, largely white agricultural county that delivered a 34.5-point Republican margin in 2024 — a dramatic shift from the competitive results it posted in earlier cycles.
Across the recorded series it reached a Democratic high of 32.5 points in 1932 and a Republican high of 56.7 points in 1920. Between 2020 and 2024 the county moved 5.6 points toward the Republican candidate; the 2024 margin was 34.4 points.
A population of 17,013, a 95% non-Hispanic-white share, and a median household income of $67,242 describe the county. The county's voting pattern over the last decade is most similar to that of Floyd County and Chickasaw 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 →
Clayton County, Iowa. Akashic. https://akashic.app/county/19043/. Accessed May 20, 2026. License: CC BY 4.0.