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 2026 population of 883. Marathon is currently declining at a rate of -0.34% annually and its population has decreased by -3.39% since the most recent census, which recorded a population of 914 in 2020.
The median household income in Marathon is $52,198 with a poverty rate of 13.24%. The median age in Marathon is 30.8 years: 30.9 years for males, and 30.3 years for females. For every 100 females there are 91.9 males.