Dubuque is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 78% of adults in Dubuque typically vote, above the U.S. average of about 62%. Among adults in Dubuque, ~38% vote Democratic, ~40% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Dubuque compares
Among cities within 25 miles, Dubuque sits roughly in the middle of the political spectrum, with 3 neighbors leaning further in the place's direction and 55 leaning the other way.
Dubuque runs about 11 points more Democratic than Iowa as a whole.
Politics vary noticeably by neighborhood within Dubuque. The east side runs the most Democratic (D+16) and the southwest side runs the most Republican (R+15), a spread of about 31 points.
Why Dubuque leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Dubuque. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Dubuque, IA sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Dubuque looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dubuque 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Asbury, IA R+18
- East Dubuque, IL R+22
- Sageville, IA R+31
- Durango, IA R+35
- Peosta, IA R+35
- Centralia, IA R+37
- Prairie Corners, WI R+37
- Menominee, IL R+35
- Louisburg, WI R+38
- Graf, IA R+36
Cities with Similar Populations
- Weatherford, TX R+59
- Hilliard, OH D+11
- Yorba Linda, CA R+15
- Eagan, MN D+23
- Haverhill, MA D+11
- Warren, OH Even
- Covina, CA D+14
- Palo Alto, CA D+52
- North Port, FL R+32
- Corvallis, OR D+54
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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.