Marysville is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 75% of adults in Marysville typically vote, above the U.S. average of about 62%. Among adults in Marysville, ~13% vote Democratic, ~62% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Marysville compares
Among cities within 25 miles, Marysville leans more Republican than 5 of 16 neighbors.
Marysville runs about 28 points more Republican than Idaho as a whole.
Politics vary noticeably by neighborhood within Marysville. The south side is the most Republican-leaning (R+75) and the north side is the least Republican-leaning (R+48), a spread of about 27 points.
Why Marysville 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 Marysville, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 4% of residents in Marysville live in densely developed areas, about 14 points below the Idaho average of 18%.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as Marysville, ID does.
Why turnout in Marysville looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Marysville 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Ashton, ID R+66
- Chester, ID R+71
- Warm River, ID R+62
- Drummond, ID R+67
- Twin Groves, ID R+67
- Lamont, ID R+67
- St. Anthony, ID R+66
- Newdale, ID R+64
- Wilford, ID R+72
- Parker, ID R+76
Cities with Similar Populations
- Potomac Shores, MD R+27
- Preston, OK R+53
- Sterling, PA R+41
- Holland, MN R+63
- Romeo, CO R+29
- Kinderhook, MI R+45
- Mount Carbon, WV R+16
- Whitehouse, KY R+72
- Hooker, GA R+71
- Quincy, MO R+68
Sources and methodology
Precinct-level voting records used to fit the model come from Idaho 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.