Southern Wisconsin League was an independent league based in Wisconsin.
1924 Brodhead, Cambridge, Edgertown, Fort Atkinson, Janesville, Milton
1926 Albany, Brodhead, Edgerton, Evansville, Footville, Janesville, Milton
1931 Albany, Clinton, Evansville, Footville, Janesville, Orfordville
1932 Stoughton enter the league and Clinton has left the League
1936 Algoma, Institute, Little Sturgeon, North Sawyer, Maplewood, Vignes
NOTE 1 - Bold means unknown Location
NOTE 2 - not sure why they called the 1936 league, Southern Wisconsin, since all the teams are in the Northeast part of Wisconsin and might have been call Souther Door County League but not sure.