Morrisonville is a hamlet (and census-designated place) in Clinton County, New York, United States. The population was 1,545 at the 2010 census.
Morrisonville is divided between the Towns of Plattsburgh and Schuyler Falls by the Saranac River, which defines the town lines between the two towns. The community is west of the City of Plattsburgh.
Morrisonville is located at 44°41′27″N 73°33′3″W / 44.69083°N 73.55083°W / 44.69083; -73.55083 (44.690778, -73.550775).