Mason City, Iowa
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | +19.5% |
| 2008 | +30.6% |
| 2012 | +24.7% |
| 2016 | +3.5% |
| 2020 | +6.5% |
| 2024 | +0.5% |
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| D | 49.2%Harris6,631 | 48.7%Trump6,567 | 2.1% | D+0.5 | R+6.1 | D+1.9 | 13,487 | |
| D | 52.3%Biden7,367 | 45.8%Trump6,445 | 1.9% | D+6.5 | D+3.1 | D+2.1 | 14,078 | |
| D | 48.2%Clinton6,636 | 44.8%Trump6,161 | 7.0% | D+3.5 | R+21.2 | D+1.4 | 13,761 | |
| D | 61.6%Obama8,834 | 36.9%Romney5,289 | 1.6% | D+24.7 | R+5.9 | D+20.8 | 14,352 | |
| D | 64.5%Obama9,608 | 33.9%McCain5,044 | 1.6% | D+30.6 | D+11.1 | D+23.4 | 14,891 | |
| D | 59.2%Kerry8,854 | 39.7%Bush5,933 | 1.1% | D+19.5 | — | D+22.0 | 14,955 |
Once a reliable labor-Democratic stronghold anchored by cement and brick industries, Mason City has trended Republican in recent cycles as working-class white voters shifted, while remaining more competitive than the surrounding rural counties.
Across the recorded series it reached a Democratic high of 30.6 points in 2008. Between 2020 and 2024 the city moved 6.1 points toward the Republican candidate; the 2024 margin was 0.5 points.
A population of 27,050, a 86% non-Hispanic-white share, and a median household income of $64,804 describe the city. The city's voting pattern over the last decade is most similar to that of Burlington and Clinton.
The cities 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.
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Mason City, Iowa. Akashic. https://akashic.app/city/1950160/. Accessed May 20, 2026. License: CC BY 4.0.