Alamosa County is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 71% of adults in Alamosa County typically vote, above the U.S. average of about 62%. Among adults in Alamosa County, ~35% vote Democratic, ~36% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How Alamosa County compares
Among counties within 50 miles, Alamosa County sits roughly in the middle of the political spectrum, with 2 neighbors leaning further in the place's direction and 2 leaning the other way.
Alamosa County runs about 14 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Alamosa County sits closer to the political middle.
Politics vary noticeably by city within Alamosa County. The west side runs the most Democratic (D+9) and the northwest side runs the most Republican (R+34), a spread of about 43 points.
Why Alamosa 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 Alamosa County, not a ranked or complete list of what matters most.
Alamosa County votes against the grain of Colorado. Colorado leans Democratic overall, while Alamosa County runs about 14 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Alamosa County, CO sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Alamosa County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Alamosa 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
- Conejos County, CO R+25
- Rio Grande County, CO R+22
- Costilla County, CO D+19
- Saguache County, CO D+5
- Custer County, CO R+33
- Huerfano County, CO R+7
- Mineral County, CO R+5
- Archuleta County, CO R+14
- Taos County, NM D+42
- Fremont County, CO R+25
Counties with Similar Populations
- Clay County, IA R+34
- Jasper County, MS D+2
- Potter County, PA R+58
- Atchison County, KS R+34
- Fayette County, AL R+68
- New Madrid County, MO R+46
- Hill County, MT R+23
- Brooks County, GA R+23
- Lawrence County, KY R+67
- Fountain County, IN R+58
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.