Iowa State Route 14 is the main north-south highway in Marshall County. This connects Marshalltown to Interstate 80, in Jasper County. IA St Rt 14 passes thorugh the following towns in Marshall County. Laurel Marshalltown IA St Rt 14 is not multi-plexed in Marshall County. IA St Rt 14 intersects the following highways in Marshall County. U.S. Rt. 30, at Marshalltown.
