Sullivan County

Sullivan County is a county in the U.S. state of New York. As of the 2020 census, the population was 78,624. The county seat is Monticello. 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 in destroying 40 Iroquois villages and chasing 5,000 of them out of the area. The county is part of the Hudson Valley region of the state.