Calvert County, MD Political Map | Democrat & Republican Areas in Calvert County

By the BestNeighborhood data science team. Last updated May 2026.

Calvert County leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.

 

About 88% of adults in Calvert County typically vote, above the U.S. average of about 62%. Among adults in Calvert County, ~38% vote Democratic, ~50% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.

How Calvert County compares

Among counties within 50 miles, Calvert County leans more Republican than 17 of 23 neighbors.

Calvert County runs about 42 points more Republican than Maryland as a whole. Maryland leans Democratic overall, while Calvert County is one of the few Republican-leaning pockets.

Politics vary noticeably by city within Calvert County. The south side is the most Republican-leaning (R+20) and the north side is the least Republican-leaning (R+6), a spread of about 14 points.

Why Calvert County leans the way it does

This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Calvert County, not a ranked or complete list of what matters most.

Calvert County votes against the grain of Maryland. Maryland leans Democratic overall, while Calvert County runs about 42 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in Calvert County are family households, above 96% of counties.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Calvert County, MD sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in Calvert County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Calvert County 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 88% of households in Calvert County own their home, compared to around 65% in nearby counties. High high-school completion lines up with higher turnout, and about 95% of adults in Calvert County have completed high school, above 91% of counties. Learn more about the findings and methodology on the political spectrum map.

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.