Marathon is located in Cortland County, NY. The population is , making Marathon the 5th largest city in Cortland County.
There are 2 public schools in Marathon with an average Homefacts rating of C+. The total crime rate for Marathon is very low , and there are 7 registered sex offenders residing in the city. Unemployment in Marathon is moderate and the median home sales price is $0. Detailed and up-to-date Marathon property reports are available for any property address.