U.S. Federal Route 61 is a north-south highway in Central Clinton County. From the Clinton/Scott County Line to near De Witt, it runs along a expressway. Then from near De Witt to Iowa State Route 136 is a multi-lane highway. From Iowa State Route 136 to the Clinton/Jackson County Line it is a expressway again. U.S. Rt. 61 passes through the following town in Clinton County. Welton U.S. Rt. 61 is multi-plexed in Clinton County. U.S. Rt. 30, near De Witt.