Summerlin South, NV Political Map | Democrat & Republican Areas in Summerlin South

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

Summerlin South is a true toss-up. About 51% of voters here vote Democratic and 49% Republican.

 

About 76% of adults in Summerlin South typically vote, above the U.S. average of about 62%. Among adults in Summerlin South, ~39% vote Democratic, ~37% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.

How Summerlin South compares

Among cities within 25 miles, Summerlin South sits roughly in the middle of the political spectrum, with 4 neighbors leaning further in the place's direction and 9 leaning the other way.

Summerlin South runs about 4 points more Democratic than Nevada as a whole.

Politics vary noticeably by neighborhood within Summerlin South. The north side runs the most Democratic (D+20) and the southwest side runs the most Republican (R+12), a spread of about 32 points.

Why Summerlin South leans the way it does

Density, race composition, education, and family structure all sit close to their national averages in Summerlin South. The lean here lands roughly where demographic data alone would predict.

Population density and Democratic lean

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

Why turnout in Summerlin South looks the way it does

Areas with high high-school completion turn out at higher rates. About 96% of adults in Summerlin South have completed high school, about 7 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.