Grand Junction is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 66% of adults in Grand Junction typically vote, near the U.S. average of about 62%. Among adults in Grand Junction, ~16% vote Democratic, ~50% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Grand Junction compares
Among cities within 25 miles, Grand Junction leans more Republican than 40 of 47 neighbors.
Grand Junction runs about 38 points more Republican than Iowa as a whole.
Why Grand Junction leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Grand Junction. The lean here lands roughly where demographic data alone would predict.
Population density and Republican lean
Places with low population density tend to lean Republican; Grand Junction, IA sits in the bottom quarter nationally on this measure.
Why turnout in Grand Junction looks the way it does
Turnout in Grand Junction sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Beaver, IA R+41
- Dana, IA R+50
- Rippey, IA R+50
- Jefferson, IA R+28
- Cooper, IA R+42
- Paton, IA R+49
- Ogden, IA R+38
- Farlin, IA R+46
- Boxholm, IA R+44
- Herndon, IA R+43
Cities with Similar Populations
- Drummond, OK R+69
- Steam Corners, OH R+59
- Sumner, ME R+42
- Olathia, MO R+70
- Highmore, SD R+59
- Wauhillau, OK R+60
- Swan, IA R+46
- Sonyea, NY Even
- Nespelem, WA D+52
- Pilot Knob, MO R+57
All Local Stats
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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.