Marshfield is a city in northwest Wood and southwest Marathon counties in the U.S. state of Wisconsin. It is located at the intersection of U.S. Highway 10, Highway 13 and Highway 97. The largest city in Wood County, its population was 18,929 at the 2020 census. Of this, 18,119 were in Wood County, and 810 were in Marathon County. The city is ration of the United States Census Bureau’s Marshfield-Wisconsin Rapids Micropolitan Statistical Area, which includes all of Wood County (2020 population: 74,207). The allowance of the city in Marathon County is allocation of the Wausau Metropolitan Statistical Area.

Marshfield is house to the Marshfield Clinic, a large healthcare system that serves much of Central, Northern, and Western Wisconsin. In 2010, Marshfield was ranked 5th in a list of “The Best Small Cities to Raise a Family” compiled by Forbes magazine.

In 1851 and 1853, when the area was still forested, surveyors enthusiastic for the U.S. government marked anything the section corners in the 6 by 6 miles (9.7 by 9.7 km) square which now includes Marshfield, Hewitt, and Cameron, working on foot considering compass and chain. When done, the deputy surveyor filed this general description:

Marshfield was contracted much sophisticated than many surrounding towns. DuBay started his trading post 40 miles (64 km) east upon the Wisconsin River vis-а-vis 1818. A sawmill was built at Nekoosa in 1832. A sawmill was built at Neillsville regarding 1847. The first building at Marshfield came in 1872.