Fenwood is a village in Marathon County, Wisconsin, United States. It is allocation of the Wausau, Wisconsin Metropolitan Statistical Area. The population was 152 at the 2010 census.

Fenwood was platted by the railroad in 1891. It was named from woods near the townsite at a fen, or marshy area. A read out office was established at Fenwood in 1892, and remained in operation until it was discontinued in 1984.

The village of Fenwood, Marathon Co., Wisconsin was platted by Alfred L. Carey, the attorney for the Milwaukee, Lake Shore & Western Railroad, November 18, 1891, about the time when that railroad struck the place; it was incorporated as a village from allowance of the town of Wien, April 16, 1904, and its first representative in the county board of Marathon county was W. A. Somers. At the mature the railroad struck the place, C. S. Curtis of Wausau erected a large axiom mill, which was in operation until 1910, when it ceased sawing. At that times there was a large profitable cheese factory in the village, owned and supplied by farmers in the towns of Wien and Cleveland. John Brinkmann and Emil Szebsdat, under final name of Brinkmann & Szeljsdat owned a general store, and George Wetterau kept the tavern or hotel in the village. Emil Szebsdat was then the village postmaster.

There was a nice state-graded frame schoolhouse bearing in mind two “departments”: principal, Vallborg Hermanson, and assistant principal, Miss Gertrude Kurtzweil – an average attendance of forty-five pupils in both departments. There were two German Evangelical Lutheran congregations, holding their services in the schoolhouse and attended by the resident ministers of the town of Wien. https://wiclarkcountyhistory.org/neighbors/marathon/history/1913FenwoodHistory.htm