Brookville is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 59% of adults in Brookville typically vote, near the U.S. average of about 62%. Among adults in Brookville, ~29% vote Democratic, ~30% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How Brookville compares
Among cities within 25 miles, Brookville sits roughly in the middle of the political spectrum, with 132 neighbors leaning further in the place's direction and 120 leaning the other way.
Brookville runs about 14 points more Republican than New York as a whole. New York leans Democratic overall, while Brookville sits closer to the political middle.
Politics vary noticeably by neighborhood within Brookville. The northwest side runs the most Democratic (D+16) and the west side runs the most Republican (R+12), a spread of about 28 points.
Why Brookville 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 Brookville, not a ranked or complete list of what matters most.
Brookville votes against the grain of New York. New York leans Democratic overall, while Brookville runs about 14 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Brookville, NY 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 Brookville looks the way it does
Renters vote less often than owners. About 38% of households in Brookville rent, about 13 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Brookville sits in the top quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Old Brookville, NY R+21
- Upper Brookville, NY R+20
- Old Westbury, NY Even
- Muttontown, NY R+11
- Greenvale, NY R+11
- Jericho, NY D+5
- Glen Head, NY R+12
- East Hills, NY D+3
- Roslyn Harbor, NY D+3
- East Norwich, NY R+19
Cities with Similar Populations
- Lumber Bridge, NC R+11
- Yorktown, TX R+56
- Centreville, MS D+27
- Wallis, TX R+54
- St. Anne, IL R+36
- Lake City, GA D+46
- Millersport, OH R+44
- Malmstrom Air Force Base, MT R+39
- Highlandville, MO R+65
- Millsap, TX R+79
Sources and methodology
Precinct-level voting records used to fit the model come from New York State Board of 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.