
Old Brookville
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 3.982
- State:
- New York
Old Brookville is a village located in Nassau County, New York. Old Brookville has a 2025 population of 2,087. Old Brookville is currently growing at a rate of 0.05% annually and its population has increased by 0.24% since the most recent census, which recorded a population of 2,082 in 2020.
The average household income in Old Brookville is $360,441 with a poverty rate of 1.71%. The median age in Old Brookville is 47 years: 49.1 years for males, and 40.9 years for females.