State Trunk Highway 26 (often called Highway 26, STH-26, or WIS 26) is a state highway in the U.S. state of Wisconsin. The route is partially a divided highway with a few freeway bypass sections for roughly 50 miles. The remaining sections of WIS 26 is a two-lane road. WIS 26 provides direct access from Janesville to Oshkosh via Fort Atkinson, Watertown, and Waupun.