46278 leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 89% of adults in 46278 typically vote, above the U.S. average of about 62%. Among adults in 46278, ~58% vote Democratic, ~31% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How 46278 compares
Among zip codes within 15 miles, 46278 leans more Democratic than 23 of 39 neighbors.
46278 runs about 50 points more Democratic than Indiana as a whole. Indiana leans Republican overall, while 46278 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 46278. The south side runs the most Democratic (D+50) and the southwest side runs the most Republican (R+17), a spread of about 67 points.
Why 46278 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 46278, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 65% of adults in 46278 hold a bachelor's degree, about 37 points above the U.S. average of 28%. Density combined with diversity predicts Democratic voting, and non-Hispanic white share in 46278 is about 63%, below 75% of zip codes. 46278 runs against the grain of Indiana, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 46278, IN sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 46278 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 46278 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 73%, about 13 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 98% of households in 46278 own their home, compared to around 65% in nearby zip codes. High high-school completion lines up with higher turnout, and about 97% of adults in 46278 have completed high school, above 86% of zip codes. 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 Indiana 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.