Delmar leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 80% of adults in Delmar typically vote, above the U.S. average of about 62%. Among adults in Delmar, ~24% vote Democratic, ~56% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Delmar compares
Among cities within 25 miles, Delmar leans more Republican than 16 of 62 neighbors.
Delmar runs about 26 points more Republican than Iowa as a whole.
Politics vary noticeably by neighborhood within Delmar. The southwest side is the most Republican-leaning (R+46) and the southeast side is the least Republican-leaning (R+26), a spread of about 21 points.
Why Delmar leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Delmar. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Delmar, IA does.
Why turnout in Delmar looks the way it does
High high-school completion lines up with higher turnout, and about 96% of adults in Delmar have completed high school, above 81% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Petersville, IA R+46
- Welton, IA R+46
- Elwood, IA R+42
- Maquoketa, IA R+25
- Charlotte, IA R+47
- Hurstville, IA R+42
- Grand Mound, IA R+42
- Spragueville, IA R+50
- Lost Nation, IA R+43
Cities with Similar Populations
- Yawkey, WV R+67
- Losantville, IN R+57
- Mendoza, TX R+11
- Riverton, MN R+36
- Dundas, IL R+64
- Harviell, MO R+74
- Penney Farms, FL R+52
- Yatesville, GA R+66
- Hoffman, MN R+43
- San Pierre, IN R+55
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.