Watertown, Massachusetts

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Watertown, Massachusetts
City
Watertown's Main Street, facing westward
Flag Seal
Motto(s):  In pace condita (Latin) "Founded in peace"
Location in Middlesex County in Massachusetts
Watertown Location in the United States
Coordinates: 42°22′15″N 71°11′00″W / 42.37083°N 71.18333°W / 42.37083; -71.18333
Country	United States
State	Massachusetts
County	Middlesex
Settled	July 1630
Incorporated	September 7, 1630
Government
• Type	Council-manager
• City Manager	George Proakis
Area [1]
• Total	4.12 sq mi (10.68 km2)
• Land	4.00 sq mi (10.35 km2)
• Water	0.13 sq mi (0.33 km2)
Elevation	36 ft (11 m)
Population  (2020)
• Total	35,329
• Density	8,841.09/sq mi (3,413.41/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (Eastern)
ZIP Code	02472
Area code	617/857
FIPS code	25-73440
GNIS feature ID	0612401
Website	www.watertown-ma.gov

Watertown is a city in Middlesex County, Massachusetts, United States, part of Greater Boston. The population was 35,329 in the 2020 census. Its neighborhoods include Bemis, Coolidge Square, East Watertown, Watertown Square, and the West End.

Watertown was one of the first Massachusetts Bay Colony settlements organized by Puritan settlers in 1630. The city is home to the Perkins School for the Blind, the Armenian Library and Museum of America, and the historic Watertown Arsenal, which produced military armaments from 1816 through World War II.