
Locust Valley
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 0.906
- State:
- New York
Locust Valley is a CDP located in Nassau County, New York. Locust Valley has a 2025 population of 3,662. Locust Valley is currently growing at a rate of 0.47% annually and its population has increased by 5.08% since the most recent census, which recorded a population of 3,485 in 2020.
The average household income in Locust Valley is $263,520 with a poverty rate of 4.05%. The median age in Locust Valley is 42.6 years: 34.5 years for males, and 45.8 years for females.