Established: June 9, 1857
Location: Central Wisconsin, USA

The Town of Seneca was established on June 9, 1857. Its name originates from the now-extinct hamlet of Seneca, once located within its borders. This settlement was known at various times as Forest City, Little Mill, and Hansen, and later as Seneca Corners. It was centered around three lumber mills: Tuttle's Mill, Stearn's Mill, and Scott's Mill.

Seneca spans approximately 32.4 square miles (84.0 km²), with 32.2 square miles (83.5 km²) of land and 0.2 square miles (0.5 km²) of water. The town's landscape includes pine barrens, tamarack swamps, and portions of the great Cranberry Marsh, which extends beyond the Yellow River. These wetland areas are rich in biodiversity and historically significant for cranberry production.