Berkshire County, Massachusetts

Berkshire County
Berkshire County Courthouse
Motto(s): 
Firmus et Paratus
(Latin "Steadfast and Ready")
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
Coordinates: 42°23′46″N 73°12′36″W / 42.39613°N 73.209892°W / 42.39613; -73.209892
Country United States
State Massachusetts
FoundedApril 24, 1761
Named afterBerkshire, England
SeatPittsfield
Largest cityPittsfield
Area
  Total
946 sq mi (2,450 km2)
  Land927 sq mi (2,400 km2)
  Water20 sq mi (50 km2)  2.1%
Population
 (2020)
  Total
129,026
  Estimate 
(2023)
126,818
  Density140/sq mi (53/km2)
DemonymBerkshirite
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district1st

Berkshire County (pronounced /ˈbɜːrkʃər/) is the westernmost county in the U.S. state of Massachusetts. As of the 2020 census, the population was 129,026. Its largest city and traditional county seat is Pittsfield. The county was founded in 1761. The Berkshire Hills are centered on Berkshire County. Residents are known as Berkshirites. It exists today only as a historical geographic region, and has no county government, with the exception of the retirement board for former county workers, and the offices of the sheriff and the registrar of deeds.