Shamrock is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 84% of adults in Shamrock typically vote, above the U.S. average of about 62%. Among adults in Shamrock, ~15% vote Democratic, ~69% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Shamrock compares
Among cities within 25 miles, Shamrock leans more Republican than 30 of 38 neighbors.
Shamrock runs about 45 points more Republican than Missouri as a whole.
Why Shamrock 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 Shamrock, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 91% of residents in Shamrock drive to work alone, about 18 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 79% of households in Shamrock are family households, above 88% of cities.
Population density and Republican lean
Places with low population density tend to lean Republican; Shamrock, MO sits below the national average on this measure.
Why turnout in Shamrock looks the way it does
Turnout in Shamrock sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Auxvasse, MO R+56
- Kingdom City, MO R+57
- Calwood, MO R+55
- Vandiver, MO R+47
- Hatton, MO R+62
- Benton City, MO R+65
- Mexico, MO R+40
- Martinsburg, MO R+65
- Williamsburg, MO R+53
- Fulton, MO R+31
Cities with Similar Populations
- New Liberty, IA R+44
- Daggett, CA R+34
- Frederick, PA R+31
- Wilson, SC Even
- Kerrick, MN R+27
- Molt, MT R+64
- Lester, AR R+15
- Couderay, WI D+10
- Nicolville, MN R+26
- Pratt, WV R+46
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.