Shell Lake
- County:
- Washburn County
- County Seat:
- Yes
- Area (mi²):
- 5.846
- State:
- Wisconsin
Shell Lake is a city located in Washburn County, Wisconsin. Shell Lake has a 2026 population of 1,393. It is also the county seat of Washburn County. Shell Lake is currently declining at a rate of -0.36% annually but its population has increased by 1.9% since the most recent census, which recorded a population of 1,367 in 2020.