Mosinee
- County:
- Marathon County
- County Seat:
- No
- Area (mi²):
- 7.855
- State:
- Wisconsin
Mosinee is a city located in Marathon County, Wisconsin. Mosinee has a 2026 population of 4,531. Mosinee is currently declining at a rate of -0.02% annually but its population has increased by 1.61% since the most recent census, which recorded a population of 4,459 in 2020.
The median household income in Mosinee is $73,479 with a poverty rate of 9.34%. The median age in Mosinee is 32.9 years: 38.1 years for males, and 29.4 years for females. For every 100 females there are 92.5 males.