Marathon City
- County:
- Marathon County
- County Seat:
- No
- Area (mi²):
- 3.263
- State:
- Wisconsin
Marathon City is a village located in Marathon County, Wisconsin. Marathon City has a 2026 population of 1,551. Marathon City is currently declining at a rate of -0.7% annually and its population has decreased by -1.71% since the most recent census, which recorded a population of 1,578 in 2020.