Martin County leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 79% of adults in Martin County typically vote, above the U.S. average of about 62%. Among adults in Martin County, ~29% vote Democratic, ~50% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Martin County compares
Among counties within 50 miles, Martin County leans more Republican than 3 of 4 neighbors.
Martin County runs about 12 points more Republican than Florida as a whole.
Politics vary noticeably by city within Martin County. The south side is the most Republican-leaning (R+42) and the southwest side is the least Republican-leaning (R+13), a spread of about 29 points.
Why Martin 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 Martin County, not a ranked or complete list of what matters most.
Martin County votes Republican even though it is densely developed (about 66%, modestly above the Florida average of 57%). Here an older population outweighs the Democratic lean that density usually predicts.
Cholesterol-screening access and voter turnout
Places with high cholesterol-screening access tend to turn out at a higher rate; Martin County, FL sits in the top tenth nationally on this measure. Cholesterol screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Martin County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Martin County is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 64%, above 71% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- St. Lucie County, FL R+5
- Okeechobee County, FL R+46
- Palm Beach County, FL D+5
- Indian River County, FL R+21
- Glades County, FL R+47
- Hendry County, FL R+26
- Broward County, FL D+20
- Highlands County, FL R+33
- Brevard County, FL R+19
- Miami-Dade County, FL R+8
Counties with Similar Populations
- Stearns County, MN R+21
- Centre County, PA D+8
- Sullivan County, TN R+50
- Schenectady County, NY D+17
- Fairfield County, OH R+23
- Alexandria City, VA D+55
- Bibb County, GA D+33
- Indian River County, FL R+21
- Rankin County, MS R+42
- Stafford County, VA D+6
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Sources and methodology
Precinct-level voting records used to fit the model come from Florida Division of 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.