Old Bridge leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 72% of adults in Old Bridge typically vote, above the U.S. average of about 62%. Among adults in Old Bridge, ~31% vote Democratic, ~41% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Old Bridge compares
Among cities within 25 miles, Old Bridge leans more Republican than 155 of 210 neighbors.
Old Bridge runs about 20 points more Republican than New Jersey as a whole. New Jersey leans Democratic overall, while Old Bridge is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Old Bridge. The west side is the most split-leaning (R+22) and the northeast side is the least split-leaning (Even), a spread of about 21 points.
Why Old Bridge 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 Old Bridge, not a ranked or complete list of what matters most.
Old Bridge votes Republican even though it is densely developed (about 68%, modestly above the New Jersey average of 61%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Old Bridge runs against the grain of New Jersey, 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; Old Bridge, NJ 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 Old Bridge looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Old Bridge 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
- Spotswood, NJ R+22
- Robertsville, NJ R+16
- Madison Park, NJ D+17
- Morganville, NJ R+12
- Sayreville, NJ D+3
- Matawan, NJ R+9
- South River, NJ R+13
- Parlin, NJ Even
- East Brunswick, NJ D+4
- Helmetta, NJ R+16
Cities with Similar Populations
- Port Huron, MI R+9
- Estero, FL R+26
- New Smyrna Beach, FL R+29
- Bell Gardens, CA D+36
- Keizer, OR D+2
- South Valley, NM D+18
- Calhoun, GA R+54
- Vicksburg, MS D+13
- Park Ridge, IL D+13
- Hillsborough, NJ D+8
Sources and methodology
Precinct-level voting records used to fit the model come from New Jersey Division 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.