46203 leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 53% of adults in 46203 typically vote, below the U.S. average of about 62%. Among adults in 46203, ~30% vote Democratic, ~23% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 46203 compares
Among zip codes within 15 miles, 46203 leans more Democratic than 21 of 46 neighbors.
46203 runs about 33 points more Democratic than Indiana as a whole. Indiana leans Republican overall, while 46203 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 46203. The northwest side runs the most Democratic (D+58) and the southeast side runs the most Republican (R+10), a spread of about 68 points.
Why 46203 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 46203, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in 46203 live in densely developed areas, about 61 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 42% of adults in 46203 have never been married, above 90% of zip codes. 46203 runs against the grain of Indiana, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 46203, IN 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 46203 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 46203 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 44% of households in 46203 rent, about 19 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 24% of adults in 46203 report food insecurity, above 87% 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.