
Sidney
- County:
- Delaware County
- County Seat:
- No
- Area (mi²):
- 2.38
- State:
- New York
Sidney is a village located in Delaware County, New York. Sidney has a 2025 population of 3,629. Sidney is currently declining at a rate of -0.41% annually and its population has decreased by -2.08% since the most recent census, which recorded a population of 3,706 in 2020.
The average household income in Sidney is $60,698 with a poverty rate of 22.57%. The median age in Sidney is 31.4 years: 42.7 years for males, and 28.9 years for females.