Chelsea, Massachusetts

Chelsea population, 2020 to 2024

Chelsea lost 304 residents from July 2020 to July 2024, a change of -0.7%. In the latest year it moved by +719. Among 58 Massachusetts places of 5,000 or more, that growth ranks 52nd; the median place changed by +1.2%. The median place of 5,000+ in Massachusetts has 44,052 people, so Chelsea is 91% of it.

Chelsea covers 2.22 square miles of land and 0.25 of water, for 18,128 people per square mile of land. The median Massachusetts place of 5,000+ has 2,852, so Chelsea is denser than the typical town.

What county Chelsea is in

All of Chelsea's residents live in Suffolk County, which had 793,144 residents in 2024. Chelsea holds 5.1% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Chelsea

1 ZIP Code Tabulation Area (ZCTA) overlaps Chelsea by at least 10% of the ZCTA's or the city's land: 02150. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Chelsea is

The Census internal point of Chelsea is at 42.396800, -71.031300. Boston, the capital, is 3.2 miles SSW in a straight line. The nearest larger place is Everett, MA (51,825 people), 1.4 miles away. The nearest city of 100,000 or more is Boston, MA, 4.1 miles away.

Daylight in Chelsea

At 42.40° N, Chelsea gets about 15 h 17 min of daylight around the June solstice and 9 h 04 min around the December solstice, a swing of 6 h 13 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Chelsea

The eight nearest incorporated places of 1,000+ in Massachusetts, measured between internal points. The closest is Everett, 1.3 miles away, with 51,825 people.