is a village in the Town of Clarkstown Rockland County, New York, United States located north of the Village of Nyack; east of West Nyack; south of Rockland Lake State Park and west of the Hudson River. The population was 1,863 at the 2000 census.
Upper Nyack has a Village Hall, and a village law court, all located in the same building on North Broadway. Upper Nyack is also home to the Empire Hook and Ladder Company No. 1, established in 1863, one of eight fire companies in the Nyack Joint Fire District.
The village is on the west bank of the Hudson River, a mile north of where the Tappan Zee Bridge carries the New York State Thruway to Tarrytown, New York.
According to the United States Census Bureau, the village has a total area of 4.2 square miles (11.0 km²), of which, 1.3 square miles (3.4 km²) of it is land and 2.9 square miles (7.5 km²) of it (68.56%) is water.