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