Worcester County, Massachusetts

Worcester County
Worcester County Courthouse
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
Coordinates: 42°21′N 71°55′W / 42.35°N 71.91°W / 42.35; -71.91
Country United States
State Massachusetts
FoundedApril 2, 1731
Named afterWorcester, Massachusetts
SeatWorcester
Largest cityWorcester
Area
  Total
1,579 sq mi (4,090 km2)
  Land1,511 sq mi (3,910 km2)
  Water68 sq mi (180 km2)
Population
 (2020)
  Total
862,111
  Density570.7/sq mi (220.3/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional districts1st, 2nd, 3rd, 4th

Worcester County (/ˈwʊstər/ WUU-stər) is a county in the U.S. state of Massachusetts. At the 2020 census, the population was 862,111, making it the second-most populous county in Massachusetts. Being 1,510.6 square miles of land area, it is the largest county in Massachusetts by geographic area. The largest city and traditional shire town is Worcester. Worcester County is part of the Worcester, MA–CT metropolitan statistical area and the Boston-Worcester-Providence combined statistical area.