Delaware County, Iowa
Precinct data
Results by precinct
12 precincts · 10,112 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Oneida/North Fork/BremenOneida/North Fork/Bremen | 335 | 1,246 | 16 | 1,597 | 21.0% | 78.0% | R+57.0 |
|---|---|---|---|---|---|---|---|
| Precinct -Milo/PrairieMilo/Prairie | 321 | 802 | 18 | 1,141 | 28.1% | 70.3% | R+42.2 |
| Precinct -Manchester 3rd WardManchester 3rd Ward | 401 | 579 | 17 | 997 | 40.2% | 58.1% | R+17.9 |
| Precinct -Manchester 2nd WardManchester 2nd Ward | 358 | 567 | 16 | 941 | 38.0% | 60.3% | R+22.2 |
| Precinct -Honey Creek/ElkHoney Creek/Elk | 176 | 627 | 16 | 819 | 21.5% | 76.6% | R+55.1 |
| Precinct -Manchester 1st WardManchester 1st Ward | 319 | 463 | 8 | 790 | 40.4% | 58.6% | R+18.2 |
| Precinct -South Fork/UnionSouth Fork/Union | 242 | 488 | 17 | 747 | 32.4% | 65.3% | R+32.9 |
| Precinct -Richland/Coffins GroveRichland/Coffins Grove | 218 | 477 | 8 | 703 | 31.0% | 67.9% | R+36.8 |
| Precinct -Delhi/Delaware CorpDelhi/Delaware Corp | 182 | 505 | 9 | 696 | 26.1% | 72.6% | R+46.4 |
| Precinct -DelawareDelaware | 164 | 482 | 5 | 651 | 25.2% | 74.0% | R+48.8 |
| Precinct -Adams/Hazel GreenAdams/Hazel Green | 172 | 415 | 13 | 600 | 28.7% | 69.2% | R+40.5 |
| Precinct -ColonyColony | 90 | 333 | 7 | 430 | 20.9% | 77.4% | R+56.5 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −11.7% |
| 1896 | −22.1% |
| 1900 | −27.7% |
| 1904 | −36.6% |
| 1908 | −23.3% |
| 1912 | +0.1% |
| 1916 | −35.3% |
| 1920 | −67.3% |
| 1924 | −49.7% |
| 1928 | −27.8% |
| 1932 | +5.4% |
| 1936 | −1.5% |
| 1940 | −34.8% |
| 1944 | −34.7% |
| 1948 | −22.4% |
| 1952 | −46.5% |
| 1956 | −37.2% |
| 1960 | −15.2% |
| 1964 | +14.8% |
| 1968 | −24.1% |
| 1972 | −24.0% |
| 1976 | −13.3% |
| 1980 | −21.1% |
| 1984 | −20.1% |
| 1988 | +7.0% |
| 1992 | −1.2% |
| 1996 | +8.5% |
| 2000 | −5.6% |
| 2004 | −7.4% |
| 2008 | +6.0% |
| 2012 | −0.2% |
| 2016 | −29.3% |
| 2020 | −35.1% |
| 2024 | −39.5% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 29.0%2,210 | 71.0%5,423 | 7,633 |
| 2020 | R | 32.6%3,235 | 65.0%6,454 | 9,932 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 17 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 12,641 | 3,171 | 3,963 | 5,505 | 2 |
| 2010 | 12,513 | 2,972 | 4,077 | 5,459 | 5 |
| 2012 | 12,629 | 2,896 | 4,105 | 5,625 | 3 |
| 2014 | 12,036 | 2,677 | 3,978 | 5,377 | 4 |
| 2016 | 11,815 | 2,477 | 4,561 | 4,750 | 27 |
| 2018 | 11,894 | 2,425 | 4,452 | 4,961 | 56 |
| 2020 | 12,275 | 2,717 | 4,873 | 4,623 | 62 |
| 2022 | 12,371 | 2,561 | 5,012 | 4,731 | 67 |
| 2024 | 12,473 | 2,385 | 5,233 | 4,784 | 71 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+86 net domestic migration · 2025
Net −897 over 2011–2025 · gain loss
Arrivals reported $54,969 in average income, against $79,915 for residents who stayed — 31% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+15.1 on average — 24 points more Democratic-leaning than Delaware County, IA itself (R+39.5).
Where arrivals came from lean of each source
- Dubuque County, IA63R+8.6
- Clayton County, IA41R+34.4
- Linn County, IA37D+9.9
- Buchanan County, IA23R+28.1
- Jones County, IA22R+26.2
Where departures went households, 2022–23
- Dubuque County, IA68
- Linn County, IA65
- Clayton County, IA32
- Buchanan County, IA20
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 | −163 |
| 2012 | −97 |
| 2013 | −134 |
| 2014 | −136 |
| 2015 | −56 |
| 2016 | −152 |
| 2017 | −165 |
| 2018 | −113 |
| 2019 | −98 |
| 2021 | +81 |
| 2022 | +53 |
| 2023 | −28 |
| 2024 | +25 |
| 2025 | +86 |
Delaware County's economy centers on livestock and grain farming, and its small-town voter base has shifted toward Republican presidential candidates by double digits over the past four election cycles, reaching a 39.5-point margin in 2024.
Across the recorded series it reached a Democratic high of 14.8 points in 1964 and a Republican high of 67.3 points in 1920. Between 2020 and 2024 the county moved 4.4 points toward the Republican candidate; the 2024 margin was 39.5 points.
A population of 17,558, a 94% non-Hispanic-white share, and a median household income of $74,989 describe the county. The county's voting pattern over the last decade is most similar to that of Chickasaw County and Jackson 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 →
Delaware County, Iowa. Akashic. https://akashic.app/county/19055/. Accessed May 20, 2026. License: CC BY 4.0.