Massachusetts Population By County in 2021

Based on the US Census Vintage data estimates, in 2021, the population of Massachusetts was 6,989,690. Among all Massachusetts counties, Middlesex[object Promise] had the highest population (1,617,099), followed by Worcester[object Promise] (862,132), and Essex[object Promise] (807,485). Nantucket[object Promise] was the least populated county (14,499).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.