Sullivan County is a county in the U.S. state of New York. As of the 2010 census, the population was 77,547. The county seat is Monticello. The county’s name honors Major General John Sullivan, who was a hero in the American Revolutionary War
Sullivan County has been a popular vacation spot since the 19th Century, with mountain climbing, boating, and other outdoor activities, and the Monticello Raceway being among the attractions.
The majority of the tourism occurs in the summer months. It was the site of the hundreds of resort complexes of the Borscht Belt (with their golf courses, social events, and entertainers), between the 1920s and 1970s. It was the site of the 1969 Woodstock Festival.