Wisconsin State Route 138 runs in Southeastern Dane County. It runs from U.S. Rt. 14, near Oregon, east to Stoughton, then south to the Dane/Rock County Line, near Cooksville. WI St Rt 138 passes through the following town in Dane County. Stoughton WI St Rt 138 is multi-plexed in Dane County. U.S. Rt. 51, at Stoughton. WI St Rt 138 intersects the following highways in Dane County. U.S. Rt. 14 near Oregon.