Hyannis Port leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 95% of adults in Hyannis Port typically vote, above the U.S. average of about 62%. Among adults in Hyannis Port, ~53% vote Democratic, ~42% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How Hyannis Port compares
Among cities within 25 miles, Hyannis Port leans more Democratic than 18 of 62 neighbors.
Hyannis Port runs about 13 points more Republican than Massachusetts as a whole.
Why Hyannis Port 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 Hyannis Port, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 56% of adults in Hyannis Port hold a bachelor's degree, about 28 points above the U.S. average of 28%. Dense areas vote Democratic, and Hyannis Port sits in the top fifth on density (about 51%, above 87% of cities).
Population density, never-married share, and Democratic lean
Places that combine high population density and a low never-married share tend to lean Democratic, as Hyannis Port, MA does.
Why turnout in Hyannis Port looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Hyannis Port 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 65%, above 66% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Barnstable Town, MA D+17
- Centerville, MA D+11
- Osterville, MA D+22
- West Yarmouth, MA D+11
- Barnstable, MA D+16
- Marstons Mills, MA D+9
- West Barnstable, MA D+9
- Cotuit, MA D+20
- South Yarmouth, MA D+19
- Yarmouth Port, MA D+20
Cities with Similar Populations
- Moselem Springs, PA R+39
- Fairview, ND R+77
- Beaver Island, MI D+13
- Rogers Mill, PA R+63
- Vollmar, CO R+43
- Colfax, ND R+43
- Miracle, KY R+79
- Stockwell, IN R+49
- Gonyon, VA R+25
- Hoxeyville, MI R+42
Sources and methodology
Precinct-level voting records used to fit the model come from Massachusetts Secretary of the Commonwealth, 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.