Gilgo
- County:
- Suffolk County
- County Seat:
- No
- Area (mi²):
- 5.019
- State:
- New York
Gilgo is a CDP located in Suffolk County, New York. Gilgo has a 2025 population of 228. Gilgo is currently growing at a rate of 2.7% annually and its population has increased by 13.43% since the most recent census, which recorded a population of 201 in 2020.
The median age in Gilgo is 63.4 years: 63.1 years for males, and 0 years for females.