Brookville
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 3.947
- State:
- New York
Brookville is a village located in Nassau County, New York. Brookville has a 2026 population of 2,924. Brookville is currently declining at a rate of -1.18% annually and its population has decreased by -1.18% since the most recent census, which recorded a population of 2,959 in 2020.