Sullivan County, New York

Sullivan County
County
Stream in the hamlet of Rock Hill
Flag Seal
Location within the U.S. state of New York
New York's location within the U.S.
Coordinates: 41°43′N 74°46′W / 41.72°N 74.76°W / 41.72; -74.76
Country	United States
State	New York
Founded	1809
Named for	John Sullivan
Seat	Monticello
Largest village	Monticello
Area
• Total	997 sq mi (2,580 km2)
• Land	968 sq mi (2,510 km2)
• Water	29 sq mi (80 km2)  2.9%
Population  (2020)
• Total	78,624 [1]
• Density	81.2/sq mi (31.4/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	19th
Website	sullivanny.us

Sullivan County is a county in the U.S. state of New York. As of the 2020 census, the population was 78,624.^[2] The county seat is Monticello.^[3] The county's name honors Major General John Sullivan, who was labeled at the time as a hero in the American Revolutionary War in part due to his successful campaign against the Iroquois (see Sullivan Expedition). The county is part of the Hudson Valley region of the state.

The county was the site of hundreds of Borscht Belt hotels and resorts, which had their heyday from the 1920s through the 1970s.

In 2010, the state's center of population was at the southern edge of Sullivan County.^[4]