Mellen
- County:
- Ashland County
- County Seat:
- No
- Area (mi²):
- 1.883
- State:
- Wisconsin
Mellen is a city located in Ashland County, Wisconsin. Mellen has a 2026 population of 686. Mellen is currently growing at a rate of 1.18% annually but its population has decreased by -1.58% since the most recent census, which recorded a population of 697 in 2020.