Colo leans heavily Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 92% of adults in Colo typically vote, above the U.S. average of about 62%. Among adults in Colo, ~32% vote Democratic, ~60% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.
How Colo compares
Among cities within 25 miles, Colo leans more Republican than 21 of 61 neighbors.
Colo runs about 17 points more Republican than Iowa as a whole.
Why Colo leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Colo. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Colo, IA does.
Why turnout in Colo looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Colo is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Colo have completed high school, above 85% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Nevada, IA R+12
- State Center, IA R+41
- Iowa Center, IA R+29
- Collins, IA R+38
- Zearing, IA R+35
- Clemons, IA R+44
- Rhodes, IA R+47
- Maxwell, IA R+33
- St. Anthony, IA R+43
- Shipley, IA R+11
Cities with Similar Populations
- San Fidel, NM D+21
- Dublin, NH D+7
- Clara, MS R+84
- Springer, NM R+5
- Falls, PA R+37
- Fairton, NJ D+25
- Hallsboro, NC R+33
- North Enid, OK R+60
- Fairfax, OK R+50
- Sheridan, MT R+47
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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.