Boulder City, NV Political Map | Democrat & Republican Areas in Boulder City

By the BestNeighborhood data science team. Last updated May 2026.

Boulder City leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.

 

About 73% of adults in Boulder City typically vote, above the U.S. average of about 62%. Among adults in Boulder City, ~31% vote Democratic, ~42% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.

How Boulder City compares

Among cities within 25 miles, Boulder City is the most Republican-leaning.

Boulder City runs about 14 points more Republican than Nevada as a whole.

Politics vary noticeably by neighborhood within Boulder City. The southwest side is the most Republican-leaning (R+34) and the east side is the least Republican-leaning (R+14), a spread of about 20 points.

Why Boulder City 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 Boulder City, not a ranked or complete list of what matters most.

Boulder City votes Republican even though it is densely developed (about 71%, well above the Nevada average of 44%). Here an older population outweighs the Democratic lean that density usually predicts.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Boulder City, NV sits in the top tenth nationally on this measure.

Why turnout in Boulder City looks the way it does

Areas with high high-school completion turn out at higher rates. About 97% of adults in Boulder City have completed high school, about 8 points above the Nevada average of 89%. Learn more about the findings and methodology on the political spectrum map.

Sources and methodology

Precinct-level voting records used to fit the model come from Nevada 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.