Map and List of Partisan Voting Index for Counties in Massachusetts

Map of Partisan Voting Index (PVI) for Counties in Massachusetts

Rep +20
Rep. 15-19
Rep. 10-14
Rep. 5-9
Rep. 1-4
Dem 1-4
Dem 5-9
Dem 10-14
Dem 15-19
Dem +20

This Map Displays the Partisan Voting Index Value for each county in Massachusetts. The Partisan Voting Index (PVI) is a measurement of how strongly a county leans toward the Democratic or Republican Party. The PVI is calculated by taking the average percentage for the winning party in a county for the last two elections and subtracting that value from the national average for that party in the same two elections. The data is based on results from the 2020 and 2016 presidential election.

List of All Counties in Massachusetts With Partisan Voting Index (2020 Presidential Election Results)

Map KeyNamePartisan Voting Index (2020)
Barnstable CountyDemocrat +11
Berkshire CountyDemocrat +23
Bristol CountyDemocrat +7
Dukes CountyDemocrat +29
Essex CountyDemocrat +14
Franklin CountyDemocrat +20
Hampden CountyDemocrat +10
Hampshire CountyDemocrat +23
Middlesex CountyDemocrat +22
Nantucket CountyDemocrat +22
Norfolk CountyDemocrat +17
Plymouth CountyDemocrat +7
Suffolk CountyDemocrat +33
Worcester CountyDemocrat +8