[The series and its rules are explained here, where you will also find links to the songs for the other states.]
49:1. Highway 51 Blues: 'Running from up Wisconsin way down to no man's land'. (1, 2.)
49:2. Dusty Old Fairgrounds: 'From the Michigan mud past the Wisconsin sun'. (1, 2.)
49:3. On, Wisconsin. (1.)
49:4. Cadillac Ranch: 'Drivin' alone through the Wisconsin night'. (1, 2, 3.)
49:5. The Wreck Of The Edmund Fitzgerald: 'The ship was the pride of the American side / Coming back from some mill in Wisconsin'. (1, 2, 3, 4, 5.)
49:6. The River In The Pines: 'It was early in the morning / In Wisconsin's dreary clime'. (1, 2, 3, 4.)
49:7. Diamonds On My Windshield: 'He's wishing he was home in a Wisconsin bed'. (1, 2, 3.)