Johnstown leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 78% of adults in Johnstown typically vote, above the U.S. average of about 62%. Among adults in Johnstown, ~26% vote Democratic, ~51% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Johnstown compares
Among cities within 25 miles, Johnstown leans more Republican than 31 of 48 neighbors.
Johnstown runs about 42 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Johnstown is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Johnstown. The northeast side is the most Republican-leaning (R+45) and the northwest side is the least Republican-leaning (R+22), a spread of about 24 points.
Why Johnstown 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 Johnstown, not a ranked or complete list of what matters most.
Johnstown votes Republican even though it is densely developed (about 31%, about 5 points below the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 77% of households in Johnstown are family households, above 81% of cities. Johnstown runs against the grain of Colorado, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Johnstown, CO sits in the top quarter 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 Johnstown looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Johnstown 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Kahler, CO R+31
- Milliken, CO R+35
- Welty, CO R+39
- Mead, CO R+26
- Berthoud, CO R+14
- Windsor, CO R+18
- Loveland, CO Even
- Gilcrest, CO R+56
- Peckham, CO R+57
- Buda, CO R+13
Cities with Similar Populations
- Spring Creek, NV R+64
- Somerton, AZ D+8
- Byron, GA R+26
- Morton, IL R+25
- Johnson City, NY D+8
- Chardon, OH R+32
- Cedarburg, WI R+5
- Dunn, NC R+23
- Cypress Quarters, FL D+3
- Lakeland North, WA D+16
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Sources and methodology
Precinct-level voting records used to fit the model come from Colorado 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.