Joseph W. Hoyt (May 18, 1840July 8, 1902) was an American merchant and Republican politician. He was a member of the Wisconsin State Senate (1885 & 1887) and State Assembly (1871), representing Vernon County.
Born in Craftsbury, Vermont, Hoyt served in the 1st Vermont Cavalry during the American Civil War. In 1863, he settled in Chaseburg, Wisconsin, and was a merchant and lumber dealer. He served on the town board, and then, on the Vernon County, Wisconsin Board of Supervisors. He was chairman of the county board. Hoyt served in the Wisconsin State Assembly in 1871 as a Republican and then in the Wisconsin State Senate during the 1885 and 1887 sessions. Hoyt died at his home in Chaseburg, Wisconsin.
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, November 8, 1870
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, November 8, 1884