
Marathon
- County:
- Cortland County
- County Seat:
- No
- Area (mi²):
- 1.13
- State:
- New York
Marathon is a village located in Cortland County, New York. Marathon has a 2025 population of 863. Marathon is currently declining at a rate of -1.15% annually and its population has decreased by -5.48% since the most recent census, which recorded a population of 913 in 2020.
The average household income in Marathon is $74,626 with a poverty rate of 9.1%. The median age in Marathon is 29.8 years: 29.9 years for males, and 28.9 years for females.