27604 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 70% of adults in 27604 typically vote, above the U.S. average of about 62%. Among adults in 27604, ~52% vote Democratic, ~18% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 27604 compares
Among zip codes within 15 miles, 27604 leans more Democratic than 21 of 24 neighbors.
27604 runs about 51 points more Democratic than North Carolina as a whole. North Carolina leans Republican overall, while 27604 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 27604. The southwest side is the most Democratic-leaning (D+62) and the northeast side is the least Democratic-leaning (D+33), a spread of about 29 points.
Why 27604 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 27604, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 88% of residents in 27604 live in densely developed areas, about 52 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 27604 sits in the top quarter (about 39%, above 80% of zip codes). 27604 runs against the grain of North Carolina, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 27604, NC sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 27604 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 27604 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from North Carolina 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.