Oak Grove leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 75% of adults in Oak Grove typically vote, above the U.S. average of about 62%. Among adults in Oak Grove, ~24% vote Democratic, ~51% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Oak Grove compares
Among cities within 25 miles, Oak Grove leans more Republican than 5 of 13 neighbors.
Oak Grove runs about 46 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Oak Grove is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Oak Grove. The northwest side is the most Republican-leaning (R+59) and the north side is the least Republican-leaning (R+30), a spread of about 29 points.
Why Oak Grove leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Oak Grove, not a ranked or complete list of what matters most.
Oak Grove votes against the grain of Colorado. Colorado leans Democratic overall, while Oak Grove runs about 46 points more Republican. Rural areas vote Republican, and Oak Grove sits in the bottom quarter on density (about 2%, below 95% of cities). A high family-household share predicts Republican voting, and about 75% of households in Oak Grove are family households, above 76% of cities.
Population density and Republican lean
Places with low population density tend to lean Republican; Oak Grove, CO sits in the bottom tenth nationally on this measure.
Why turnout in Oak Grove looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Oak Grove have completed high school, about 7 points above the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Montrose, CO R+24
- Maher, CO R+56
- Cimarron, CO R+6
- Olathe, CO R+49
- Crawford, CO R+39
- Ridgway, CO D+10
- Cory, CO R+56
- Lazear, CO R+49
Cities with Similar Populations
- Naturl Br Sta, VA R+61
- Schley, IA R+45
- Waldrop, VA R+30
- Fugates Hill, VA R+74
- Cooper Hill, MO R+70
- Republic, KS R+78
- Marshland, WI R+26
- Malcolm, MD Even
- Texas, KY R+64
- Shorewood-Tower Hills-Harbert, MI D+16
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Sources and methodology
Precinct-level voting records used to fit the model come from Colorado 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.