Columbus Junction leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 82% of adults in Columbus Junction typically vote, above the U.S. average of about 62%. Among adults in Columbus Junction, ~33% vote Democratic, ~49% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Columbus Junction compares
Among cities within 25 miles, Columbus Junction leans more Republican than 3 of 50 neighbors.
Columbus Junction runs about 6 points more Republican than Iowa as a whole.
Politics vary noticeably by neighborhood within Columbus Junction. The southeast side is the most Republican-leaning (R+42) and the north side is the least Republican-leaning (R+10), a spread of about 32 points.
Why Columbus Junction 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 Columbus Junction, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 81% of households in Columbus Junction are family households, about 14 points above the U.S. average of 67%.
Non-English at home and voter turnout
Places with a low non-English-at-home share tend to turn out at a higher rate; Columbus Junction, IA sits in the bottom tenth nationally on this measure.
Why turnout in Columbus Junction looks the way it does
Turnout in Columbus Junction sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fredonia, IA R+38
- Columbus City, IA R+25
- Cotter, IA R+46
- Letts, IA R+42
- Wyman, IA R+46
- Conesville, IA R+37
- Grandview, IA R+46
- Gladwin, IA R+44
- Haskins, IA R+44
- Crawfordsville, IA R+44
Cities with Similar Populations
- Rock Island, WA R+36
- Pavilion, NY R+44
- Monona, IA R+36
- Onondaga, MI R+34
- Willard, NY D+8
- Richwood, WV R+50
- Oceana, WV R+69
- Gillett, PA R+60
- Kenvil, NJ R+13
- Blue Eye, MO R+49
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.