
Hartsville
- County:
- Steuben County
- County Seat:
- No
- Area (mi²):
- 36.143
- State:
- New York
Hartsville is located in Steuben County, New York. Hartsville has a 2025 population of 543. Hartsville is currently declining at a rate of -0.55% annually and its population has decreased by -2.86% since the most recent census, which recorded a population of 559 in 2020.
The average household income in Hartsville is $74,486 with a poverty rate of 15.26%. The median age in Hartsville is 45.9 years: 46.8 years for males, and 45.6 years for females.