Jarrettsville leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 96% of adults in Jarrettsville typically vote, above the U.S. average of about 62%. Among adults in Jarrettsville, ~30% vote Democratic, ~66% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.
How Jarrettsville compares
Among cities within 25 miles, Jarrettsville leans more Republican than 80 of 129 neighbors.
Jarrettsville runs about 67 points more Republican than Maryland as a whole. Maryland leans Democratic overall, while Jarrettsville is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Jarrettsville. The northeast side is the most Republican-leaning (R+48) and the southwest side is the least Republican-leaning (R+32), a spread of about 16 points.
Why Jarrettsville 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 Jarrettsville, not a ranked or complete list of what matters most.
Jarrettsville votes against the grain of Maryland. Maryland leans Democratic overall, while Jarrettsville runs about 67 points more Republican. A high family-household share predicts Republican voting, and about 78% of households in Jarrettsville are family households, above 85% of cities.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Jarrettsville, MD sits in the top tenth nationally on this measure.
Why turnout in Jarrettsville looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Jarrettsville 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 69%, about 9 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in Jarrettsville own their home, about 20 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Jarrettsville have completed high school, above 88% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Forest Hill, MD R+33
- Fallston, MD R+26
- Pylesville, MD R+47
- White Hall, MD R+33
- Street, MD R+47
- Bel Air North, MD R+13
- Monkton, MD R+7
- Baldwin, MD R+22
- Hereford, MD R+10
- Hydes, MD R+26
Cities with Similar Populations
- Smithville, TX R+41
- Paulsboro, NJ D+27
- Spencer, IN R+52
- Evansville, WI R+7
- Mascotte, FL R+18
- Rocky Face, GA R+65
- Beaverton, MI R+45
- Haiku-Pauwela, HI D+11
- Marshall, NC R+37
- Louisburg, KS R+39
Sources and methodology
Precinct-level voting records used to fit the model come from Maryland State Board of 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.