
Roslyn
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 0.645
- State:
- New York
Roslyn is a village located in Nassau County, New York. Roslyn has a 2025 population of 3,050. Roslyn is currently growing at a rate of 0.99% annually and its population has increased by 5.17% since the most recent census, which recorded a population of 2,900 in 2020.
The average household income in Roslyn is $160,199 with a poverty rate of 8.8%. The median age in Roslyn is 58.9 years: 53 years for males, and 61.9 years for females.