The Town of Seneca is located in Wood County, Wisconsin, United States.

The east end of the town, within three miles of the Wisconsin River, was in the "Indian strip," sold by the Menominee to the U.S. government in the 1836 Treaty of the Cedars.

[3] In 1839 a crew working for the U.S. government surveyed what would become the east and south edges of the town, walking through the woods and crossing the river, measuring with chain and compass.

[4][5] In 1851 a different crew surveyed the section lines of the town, producing this general description: The East & South East portion of this Town consists of alternate ridges of pine barrens and Tamarack Swamps.

The West & north parts of the Town consist of a portion of the great Cranberry Marsh which extends to & beyond Yellow river.

The Marsh is wet & unfit for cultivation & has upon it small Islands (so called) of hard land with a few trees; Scattering Pines, Tamarack & Blk Oak are found nearly all over it so much so that we almost invariably found bearing trees for our corners.