U.S. Federal Route 218 is a north-south highway in the southwest corner of Chickasaw County. U.S. Rt. 218 does not pass through any towns in Chickasaw County. U.S. Rt. 218 is multi-plexed in Chickasaw County. Iowa State Route 27, through Chickasaw County.
U.S. Rt. 218 intersects the following highway in Chickasaw County. Iowa State Route 346, near Nashua.
NB U.S. Rt. 218/IA St Rt 27 at IA St Rt 346. NB U.S. Rt. 218/IA St Rt 27 south of IA St Rt 346 SB U.S. Rt. 218/IA St Rt 27 south of Nashua. NB U.S. Rt. 218/IA St Rt 27 at the Bremer/Chicksaw County Line.