State Trunk Highway 155 (often called Highway 155, STH-155 or WIS 155) is a 6.94-mile (11.17 km) state highway in Villas County, Wisconsin, United States, that runs north–south from Wisconsin Highway 70 (WIS 70) St. Germain to the northern of two junctions with County Trunk Highway N (CTH‑N) Sayner. The highway is maintained by the Wisconsin Department of Transportation.