Plattsburgh is a city located in the state of New York, United States. It serves as the county seat of Clinton County and is situated on the north-western shore of Lake Champlain. The city lies just to the northeast of Adirondack Park, positioned immediately outside of the park's boundaries.
As of the 2020 census, the population of Plattsburgh was 19,841, with a combined population of 31,727 when including the surrounding Town of Plattsburgh. The city is the second largest community in the North Country region and functions as the primary commercial hub for the sparsely populated northern Adirondack Mountains.
The region's history includes early exploration by Samuel de Champlain, who was the first recorded European to sail into the Champlain Valley. In 1609, he claimed the area as part of New France.