Twain leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 61% of adults in Twain typically vote, near the U.S. average of about 62%. Among adults in Twain, ~44% vote Democratic, ~17% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How Twain compares
Among neighborhoods within 5 miles, Twain is the least Democratic-leaning.
Twain runs about 57 points more Democratic than Iowa as a whole. Iowa leans Republican overall, while Twain is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within Twain. The northwest side is the most Democratic-leaning (D+57) and the southwest side is the least Democratic-leaning (D+16), a spread of about 40 points.
Why Twain leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Twain, not a ranked or complete list of what matters most.
Twain votes against the grain of Iowa. Iowa leans Republican overall, while Twain runs about 57 points more Democratic.
Housing overcrowding and voter turnout
Places with heavy housing overcrowding tend to turn out at a lower rate; Twain, Iowa City, IA sits in the top quarter nationally on this measure.
Why turnout in Twain looks the way it does
Turnout in Twain sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Longfellow, Iowa City, IA D+48
- Lucas, Iowa City, IA D+45
- Roosevelt, Iowa City, IA D+55
- Mann, Iowa City, IA D+51
- Weber, Iowa City, IA D+46
- Kirkwood, Coralville, IA D+52
- Wickham, Coralville, IA D+34
- Penn, North Liberty, IA D+23
- Southwest Area, Cedar Rapids, IA D+21
- Taylor, Cedar Rapids, IA D+24
Neighborhoods with Similar Populations
- Harvest Bend, Houston, TX D+5
- South Coconut Grove, Miami, FL D+26
- Los Angeles Heights-Keystone, San Antonio, TX D+36
- Rossville, Staten Island, NY R+57
- South Beaverton, Beaverton, OR D+41
- Bagley Downs, Vancouver, WA D+20
- Avalon Highlands, Chicago, IL D+84
- Mount Washington, Pittsburgh, PA D+40
- Crescent Hill, Louisville, KY D+46
- Old Seminol Heights, Tampa, FL D+36
Sources and methodology
Precinct-level voting records used to fit the model come from Iowa 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.