Rio Nido leans heavily Democratic by roughly 46 points: about 73% of voters vote Democratic and 27% Republican.
About 50% of adults in Rio Nido typically vote, below the U.S. average of about 62%. Among adults in Rio Nido, ~37% vote Democratic, ~13% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How Rio Nido compares
Among cities within 25 miles, Rio Nido leans more Democratic than 24 of 39 neighbors.
Rio Nido runs about 25 points more Democratic than California as a whole.
Why Rio Nido 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 Rio Nido, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 39% of adults in Rio Nido hold a bachelor's degree, about 11 points above the U.S. average of 28%.
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; Rio Nido, CA sits in the top quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Rio Nido looks the way it does
Renters vote less often than owners. About 31% of households in Rio Nido rent, about 6 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Rio Nido sits in the top quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Guerneville, CA D+53
- Guernewood Park, CA D+37
- Forestville, CA D+53
- Jimtown, CA D+44
- Monte Rio, CA D+54
- Duncans Mills, CA D+48
- Cazadero, CA D+43
- Healdsburg, CA D+51
- Graton, CA D+55
- Windsor, CA D+30
Cities with Similar Populations
- Spanish Village, CO R+60
- Ralston, OK R+63
- Middleburg, KY R+77
- Augusta, MT R+55
- Middlesworth, IL R+66
- Prairie Point, MS D+60
- Tocsin, IN R+65
- Ripplemead, VA R+54
- West Somerset, NY R+39
- Tarentum, AL R+50
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Sources and methodology
Precinct-level voting records used to fit the model come from California 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.