U.S. Federal Route 30 is the main east-west highway across Southern Clinton County. From De Witt to Clinton it runs along a multi-lane highway. U.S. Rt. 30 passes through the following towns in Clinton County. Clinton Grand Mound Calamus Wheatland U.S. Rt. 30 is multi-plexed in Clinton County. U.S. Rt. 67, at Clinton.
WB U.S. Rt. 30/NB U.S. Rt. 61 near De Witt. A BGS on WB U.S. Rt. 30/NB U.S. Rt. 61. A BGS on NB U.S. Rt. 61. A set of guide markers in Clinton. WB U.S. Rt. 30/NB U.S. Rt. 67 on the westside of Clinton. EB U.S. Rt. 30/NB U.S. Rt. 67 in Clinton. EB U.S. Rt. 30 at the Iowa side of the Mississippi River Bridge. EB U.S. Rt. 30 crossing the Mississippi River. EB U.S. Rt. 30 in mid-span of the Mississippi River Bridge.
