Waterloo leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 80% of adults in Waterloo typically vote, above the U.S. average of about 62%. Among adults in Waterloo, ~27% vote Democratic, ~54% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Waterloo compares
Among cities within 25 miles, Waterloo leans more Republican than 16 of 51 neighbors.
Waterloo runs about 14 points more Republican than Nebraska as a whole.
Why Waterloo leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Waterloo. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Waterloo, NE sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Waterloo looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Waterloo 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 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Waterloo have completed high school, above 95% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- King Lake, NE R+38
- Elkhorn, NE R+17
- Venice, NE R+40
- Valley, NE R+32
- Yutan, NE R+49
- Gretna, NE R+28
- Boys Town, NE R+5
- Bennington, NE R+18
- Wann, NE R+52
- Chalco, NE R+7
Cities with Similar Populations
- Butler, GA R+3
- Double Oak, TX R+38
- Whitehall, WI R+26
- Byrnes Mill, MO R+40
- Ashaway, RI R+11
- Wormleysburg, PA D+8
- Fowlers Mill, OH R+26
- Scott Depot, WV R+50
- Canadian, TX R+64
- Ocean Grove, NJ D+34
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Sources and methodology
Precinct-level voting records used to fit the model come from Nebraska 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.