Yuma County is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 79% of adults in Yuma County typically vote, above the U.S. average of about 62%. Among adults in Yuma County, ~16% vote Democratic, ~63% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Yuma County compares
Among counties within 50 miles, Yuma County leans more Republican than 1 of 4 neighbors.
Yuma County runs about 71 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Yuma County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Yuma County. The northeast side is the most Republican-leaning (R+77) and the west side is the least Republican-leaning (R+46), a spread of about 31 points.
Why Yuma County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Yuma County, not a ranked or complete list of what matters most.
Yuma County votes against the grain of Colorado. Colorado leans Democratic overall, while Yuma County runs about 71 points more Republican. Rural areas vote Republican, and Yuma County sits in the bottom quarter on density (about 12%, below 79% of counties).
Population density and Republican lean
Places with low population density tend to lean Republican; Yuma County, CO sits in the bottom quarter nationally on this measure.
Why turnout in Yuma County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Yuma County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Washington County, CO R+70
- Phillips County, CO R+53
- Cheyenne County, KS R+71
- Dundy County, NE R+67
- Kit Carson County, CO R+64
- Chase County, NE R+71
- Logan County, CO R+50
- Sedgwick County, CO R+50
- Sherman County, KS R+66
- Perkins County, NE R+76
Counties with Similar Populations
- Jackson County, MN R+42
- Carroll County, MS R+40
- Ochiltree County, TX R+58
- Madison Parish, LA D+6
- Franklin County, IA R+43
- Perry County, AR R+62
- Lewis County, MO R+59
- Keokuk County, IA R+47
- Marshall County, KS R+53
- Nome Census Area, AK D+23
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.