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is a village located in the Town of Thompson in Sullivan County, New York, United States. The population was 6,512 at the 2000 census. It is the seat for the Town of Thompson and the county seat of Sullivan County. The village was named after the residence of Thomas Jefferson, but is pronounced as "mon-tah-sell-oh".
is in the central part of Thompson, adjacent to New York Route 17. Monticello is the largest village in the county.
According to the United States Census Bureau, the village has a total area of 4.1 square miles (10.5 km²), all of it land.
The Village of Monticello is located in the southern portion of Upstate New York in the Catskill Mountains region. By driving distance, Monticello is approximately NE of Scranton, Pennsylvania, SE of Binghamton, New York, NW of New York City, New York, and SW of Albany, New York.