Iowa State Route 21 runs north-south along the western county line in Iowa County. IA St Rt 21 does not pass through any towns in Iowa County. IA St Rt 21 is multi-plexed in Iowa County. U.S. Rt. 6, near Victor. IA St Rt 21 intersects the following highways in Iowa County. U.S. Rt. 6, near Victor. Iowa State Route 212, near Belle Plaine.
