
Sayville
- County:
- Suffolk County
- County Seat:
- No
- Area (mi²):
- 5.313
- State:
- New York
Sayville is a CDP located in Suffolk County, New York. Sayville has a 2025 population of 15,968. Sayville is currently declining at a rate of -0.37% annually but its population has increased by 0.36% since the most recent census, which recorded a population of 15,910 in 2020.
The average household income in Sayville is $174,566 with a poverty rate of 5.54%. The median age in Sayville is 44.6 years: 41.3 years for males, and 46.9 years for females.