Massachusetts Population By County in 2020

Based on the US Census Vintage data estimates, in 2020, the population of Massachusetts was 6,995,729. Among all Massachusetts counties, Middlesex[object Promise] had the highest population (1,628,671), followed by Worcester[object Promise] (859,708), and Essex[object Promise] (808,491). Nantucket[object Promise] was the least populated county (14,237).

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.