Dedham is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 83% of adults in Dedham typically vote, above the U.S. average of about 62%. Among adults in Dedham, ~19% vote Democratic, ~64% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Dedham compares
Among cities within 25 miles, Dedham leans more Republican than 18 of 42 neighbors.
Dedham runs about 40 points more Republican than Iowa as a whole.
Why Dedham leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Dedham. The lean here lands roughly where demographic data alone would predict.
Park access and Republican lean
Places with low park coverage tend to lean Republican; Dedham, IA sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Dedham looks the way it does
Turnout in Dedham 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 Cities
- Willey, IA R+57
- Templeton, IA R+59
- Coon Rapids, IA R+53
- Roselle, IA R+60
- Ross, IA R+57
- Gray, IA R+57
- Halbur, IA R+60
- Carroll, IA R+34
- Glidden, IA R+56
- Manning, IA R+47
Cities with Similar Populations
- South Dennis, NJ R+27
- Ackerly, TX R+80
- Alamo, IN R+61
- Winfred, SD R+52
- Three Creeks, AR R+56
- Penfield, GA R+10
- Beals, ME R+27
- Louise, GA R+25
- Raccoon Bend, TX R+46
- Nashville, MO R+72
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.