U.S. Federal Route 231 runs north-south in the southwest corner of Porter County. It runs from the Jasper/Porter County Line, at the Kankakee River to the Lake/Porter County Line, near Hebron. U.S. Rt. 231 passes through the following town in Porter County. Hebron
SB U.S. Rt. 231 at the Lake/Porter County Line. SB U.S. Rt. 231 north of Hebron. SB U.S. Rt. 231 north of IN St Rt 2 in Hebron. SB U.S. Rt. 231/WB IN St Rt 2 in Hebron. SB U.S. Rt. 231/WB IN St Rt 2 in Hebron. SB U.S. Rt. 231/WB IN St Rt 2 south of Hebron. SB U.S. Rt. 231/WB IN St Rt 2 at west IN St Rt 2. SB U.S. Rt. 231 south of IN St Rt 2. SB U.S. Rt. 231 south of west IN St Rt 2.