Marshfield
- Country: United States
- State: Wisconsin
- Population: 18,467 (2016)
- Latitude: 44° 40.1' N (44.66885°)
- Longitude: 90° 10.3' W (-90.1718°)
- Elevation: 392 m/1,286 ft. above sea level
- Time zone: America/Chicago (UTC -06:00); DST observed (UTC -05:00)