Waterloo is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 77% of adults in Waterloo typically vote, above the U.S. average of about 62%. Among adults in Waterloo, ~16% vote Democratic, ~60% Republican, and ~24% 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 28 of 42 neighbors.
Waterloo runs about 44 points more Republican than Texas as a whole.
Why Waterloo 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 Waterloo, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 82% of households in Waterloo are family households, about 15 points above the U.S. average of 67%.
Population density and Republican lean
Places with low population density tend to lean Republican; Waterloo, TX sits in the bottom quarter nationally on this measure.
Why turnout in Waterloo looks the way it does
Areas with high high-school completion turn out at higher rates. About 99% of adults in Waterloo have completed high school, about 13 points above the Texas average of 86%. Limited routine healthcare access lines up with lower turnout, and Waterloo sits in the bottom quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hoxie, TX R+59
- Taylor, TX R+2
- Sandoval, TX R+59
- Granger, TX R+40
- Noack, TX R+58
- Laneport, TX R+60
- Jonah, TX R+26
- Rices Crossing, TX R+54
- Bartlett, TX R+36
Cities with Similar Populations
- Sedan, MN R+49
- Alvan, IL R+62
- Coble, TN R+73
- Tobias, NE R+58
- Coyanosa, TX R+52
- Prescott, IN R+57
- Newbern, VA R+49
- Westons Mills, NY R+35
- Charlemont, VA R+56
- West Plymouth, NH D+19
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Texas Secretary of State, Elections Division, 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.