Upper Brookville
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 4.299
- State:
- New York
Upper Brookville is a village located in Nassau County, New York. Upper Brookville has a 2026 population of 1,771. Upper Brookville is currently growing at a rate of 0.28% annually and its population has increased by 0.06% since the most recent census, which recorded a population of 1,770 in 2020.