Rios leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 68% of adults in Rios typically vote, above the U.S. average of about 62%. Among adults in Rios, ~32% vote Democratic, ~36% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Rios compares
Among cities within 25 miles, Rios leans more Republican than 10 of 15 neighbors.
Rios runs about 8 points more Democratic than Texas as a whole.
Politics vary noticeably by neighborhood within Rios. The southeast side is the most split-leaning (R+21) and the north side is the least split-leaning (Even), a spread of about 19 points.
Why Rios leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Rios, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 11% of adults in Rios hold a bachelor's degree, about 14 points below the Texas average of 26%. Rural areas vote Republican, and Rios sits in the bottom quarter on density (about 2%, below 97% of cities).
Population density and Republican lean
Places with low population density tend to lean Republican; Rios, TX sits in the bottom tenth nationally on this measure.
Why turnout in Rios looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Rios 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 42%, about 11 points below the Texas average of 54%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Cruz Calle, TX R+11
- Concepcion, TX Even
- Palito Blanco, TX Even
- Premont, TX R+7
- Benavides, TX R+2
- Ben Bolt, TX R+14
- Realitos, TX Even
- Falfurrias, TX D+7
- San Diego, TX R+5
- San Jose, TX R+9
Cities with Similar Populations
- Yonges Island, SC D+6
- Mulch, VA R+33
- Nile, NY R+46
- Bullock, AL R+69
- Stark, IL R+55
- Talpa, TX R+81
- Lanham, TX R+75
- Lamont, NY R+50
- Tampico, MT R+61
- Kenna, NM R+78
All Local Stats
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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.