Fairfield leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 96% of adults in Fairfield typically vote, above the U.S. average of about 62%. Among adults in Fairfield, ~55% vote Democratic, ~41% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.
How Fairfield compares
Among cities within 25 miles, Fairfield is the most Democratic-leaning.
Fairfield runs about 27 points more Democratic than Iowa as a whole. Iowa leans Republican overall, while Fairfield is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Fairfield. The north side runs the most Democratic (D+36) and the southwest side runs the most Republican (R+3), a spread of about 39 points.
Why Fairfield leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Fairfield, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 48% of adults in Fairfield hold a bachelor's degree, about 19 points above the U.S. average of 28%. Dense areas vote Democratic, and Fairfield sits in the top fifth on density (about 43%, above 85% of cities). Fairfield runs against the grain of Iowa, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Fairfield, IA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Fairfield looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Fairfield have completed high school, about 7 points above the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Maharishi Vedic City, IA R+42
- Perlee, IA R+47
- Libertyville, IA R+48
- Salina, IA R+47
- Pekin, IA R+46
- Birmingham, IA R+56
- Batavia, IA R+43
- Lockridge, IA R+48
- Glasgow, IA R+49
- East Pleasant Plain, IA R+47
Cities with Similar Populations
- Romeo, MI R+32
- Merriam, KS D+20
- Hollywood, MD R+26
- Brandenburg, KY R+49
- Vernon, TX R+41
- Leonardtown, MD R+19
- Garnet Valley, PA Even
- Carroll, IA R+34
- Brookhaven, PA D+17
- Wapato, WA D+14
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Sources and methodology
Precinct-level voting records used to fit the model come from Iowa Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.