Old Field is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.
About 75% of adults in Old Field typically vote, above the U.S. average of about 62%. Among adults in Old Field, ~39% vote Democratic, ~36% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Old Field compares
Among cities within 25 miles, Old Field leans more Democratic than 105 of 125 neighbors.
Old Field runs about 8 points more Republican than New York as a whole.
Why Old Field leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Old Field. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Old Field, NY sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Old Field looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Old Field 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 75%, about 15 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Old Field have completed high school, above 87% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Poquott, NY D+11
- East Setauket, NY R+2
- Setauket-East Setauket, NY D+3
- Belle Terre, NY R+4
- Stony Brook, NY D+23
- Port Jefferson, NY D+11
- Stony Brook University, NY D+35
- Head of the Harbor, NY R+16
- Nissequogue, NY R+20
- Port Jefferson Station, NY R+15
Cities with Similar Populations
- Iaeger, WV R+79
- Tracys Landing, MD R+15
- Roscoe, MN R+54
- Wampee, SC R+18
- Echo Lake, NJ R+29
- Prentiss, KY R+69
- Haviland, KS R+70
- Stag Park, NC R+39
- Primrose, GA R+17
- Happyland, OK R+68
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.