Marathon is a city located in Cortland County New York. Marathon has a 2020 population of 1,827. Marathon is currently declining at a rate of -0.71% annually and its population has decreased by -6.64% since the most recent census, which recorded a population of 1,957 in 2010. Marathon reached it's highest population of 1,957 in 2010.
The average household income in Marathon is $74,312 with a poverty rate of 8.58%. The median rental costs in recent years comes to $687 per month, and the median house value is $112,700. The median age in Marathon is 40.7 years, 40.3 years for males, and 41.5 years for females.