46303 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 83% of adults in 46303 typically vote, above the U.S. average of about 62%. Among adults in 46303, ~26% vote Democratic, ~57% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How 46303 compares
Among zip codes within 15 miles, 46303 leans more Republican than 23 of 28 neighbors.
46303 runs about 18 points more Republican than Indiana as a whole.
Politics vary noticeably by block within 46303. The southwest side is the most Republican-leaning (R+52) and the east side is the least Republican-leaning (R+31), a spread of about 21 points.
Why 46303 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 46303, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 77% of households in 46303 are family households, about 11 points above the U.S. average of 67%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 46303, IN sits in the top quarter nationally on this measure.
Why turnout in 46303 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 46303 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 64%, above 58% of zip codes. Homeowners vote more often than renters, and about 88% of households in 46303 own their home, above 80% of zip codes. High high-school completion lines up with higher turnout, and about 96% of adults in 46303 have completed high school, above 80% 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.