Spencer
- County:
- Marathon County
- County Seat:
- No
- Area (mi²):
- 1.97
- State:
- Wisconsin
Spencer is a village located in Marathon County, Wisconsin. Spencer has a 2026 population of 1,813. Spencer is currently declining at a rate of -0.17% annually and its population has decreased by -0.66% since the most recent census, which recorded a population of 1,825 in 2020.