Massachusetts - County Infection Estimates

See state-wide estimates here.

Click on a county name to view the infections estimates for that county.

See the Counties Summary page for a searchable and sortable table.

Note: Due to the inherent lag between infections and reporting of cases, our estimates of infections are as of 14 days ago.

Last updated: January 22, 2021

Massachusetts Note: Cases and deaths for Dukes and Nantucket counties are aggregated by Massachusetts into one, and hence are not reported separately.

FIPS Code County Population Confirmed Cases % Currently Infected % Total Infected
25017 Middlesex 1,611,699 95,512 2.3 20.3
25027 Worcester 830,622 55,257 2.8 21.2
25025 Suffolk 803,907 67,004 2.9 30.7
25009 Essex 789,034 73,092 3.5 30.1
25021 Norfolk 706,775 36,599 2.4 17.9
25005 Bristol 565,217 46,345 3.8 24.5
25023 Plymouth 521,202 32,974 3.1 21.9
25013 Hampden 466,372 34,256 3.1 23.2
25001 Barnstable 212,990 7,783 2.0 11.5
25015 Hampshire 160,830 5,175 1.6 10.0
25003 Berkshire 124,944 4,161 1.9 10.4
25011 Franklin 70,180 1,651 1.0 8.0
25007 Dukes 17,332 0 0.0 0.0
25019 Nantucket 11,399 0 0.0 0.0