Cameron County is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 46% of adults in Cameron County typically vote, below the U.S. average of about 62%. Among adults in Cameron County, ~23% vote Democratic, ~23% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How Cameron County compares
Among counties within 50 miles, Cameron County sits roughly in the middle of the political spectrum, with 1 neighbors leaning further in the place's direction and 1 leaning the other way.
Cameron County runs about 11 points more Democratic than Texas as a whole.
Politics vary noticeably by city within Cameron County. The southeast side runs the most Democratic (D+3) and the northeast side runs the most Republican (R+25), a spread of about 28 points.
Why Cameron County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Cameron County. The lean here lands roughly where demographic data alone would predict.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Cameron County, TX does.
Why turnout in Cameron County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Cameron County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 48%, about 6 points below the Texas average of 54%. Renters vote less often than owners, and about 33% of households in Cameron County rent, above 82% of counties. Low high-school completion lines up with lower turnout, and about 72% of adults in Cameron County have completed high school, in the bottom fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Willacy County, TX R+7
- Hidalgo County, TX R+2
- Kenedy County, TX R+44
- Starr County, TX R+7
- Brooks County, TX D+7
- Kleberg County, TX R+6
- Jim Hogg County, TX R+2
- Nueces County, TX R+4
- Zapata County, TX R+7
- Jim Wells County, TX R+14
Counties with Similar Populations
- Loudoun County, VA D+18
- Clackamas County, OR D+13
- Hillsborough County, NH D+11
- Pinal County, AZ R+16
- Richland County, SC D+38
- Mobile County, AL R+8
- Berks County, PA R+8
- Lucas County, OH D+17
- Charleston County, SC D+14
- Sarasota County, FL R+17
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Sources and methodology
Precinct-level voting records used to fit the model come from Texas Secretary of State, Elections Division, 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.