Dallas County is a Republican stronghold. About 17% of voters here vote Democratic and 83% Republican.
About 75% of adults in Dallas County typically vote, above the U.S. average of about 62%. Among adults in Dallas County, ~13% vote Democratic, ~62% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Dallas County compares
Among counties within 50 miles, Dallas County leans more Republican than 10 of 12 neighbors.
Dallas County runs about 48 points more Republican than Missouri as a whole.
Why Dallas 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 Dallas County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Dallas County, about 93% of residents are non-Hispanic white, about 21 points above the U.S. average of 72%; about 15% of adults hold a bachelor's degree, about 7 points below the Missouri average of 22%. Rural areas vote Republican, and Dallas County sits in the bottom quarter on density (about 9%, below 85% of counties). A high family-household share predicts Republican voting, and about 73% of households in Dallas County are family households, above 90% of counties.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Dallas County, MO sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Dallas County looks the way it does
Turnout in Dallas County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Polk County, MO R+61
- Laclede County, MO R+61
- Hickory County, MO R+62
- Webster County, MO R+64
- Greene County, MO R+18
- Camden County, MO R+54
- Christian County, MO R+51
- Dade County, MO R+67
- Cedar County, MO R+65
- Wright County, MO R+69
Counties with Similar Populations
- Morgan County, WV R+56
- Franklin County, AR R+64
- Clayton County, IA R+39
- Cooper County, MO R+46
- Chickasaw County, MS R+12
- Lewis County, WV R+57
- Mason County, KY R+42
- Mariposa County, CA R+16
- Tama County, IA R+25
- Holmes County, MS D+60
Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.