Established in 1974, the MnJHL developed players 20 years old and younger for over 40 years. Many MnJHL players, coaches and officials alumni have moved on to college hockey and professional hockey leagues. Since the inaugural season, the MnJHL had expanded up to 17 teams in the 2014–15 season with teams in Minnesota, Wisconsin, Illinois, Indiana, Michigan, Missouri and Ohio. The league has a history of USA Hockey national championship teams. League members won national championships six times in the 1990s. In 2012, the MnJHL expanded outside of the Minnesota and Wisconsin areas adding teams from the Great Lakes Junior Hockey League. The GLJHL switched from USA Hockey to the Amateur Athletic Union and eight of its teams refused to go with it. The eight Great Lakes Division teams formed their own division in the MnJHL while the original teams compete in the Minnesota Division. The Great Lakes Division would be renamed the Central Division prior to the 2014-15 season. The league also expanded into southern Minnesota for 2012–13. Steele County Blades, based in Owatonna, were approved by the league board and play out of Four Seasons Centre. The United States Premier Hockey League announced on December 18, 2014 the formation of a Midwest Division to begin in the 2015-16 season by adding the entire Central Division of the MnJHL. By the end of the season most of the remaining teams in the MnJHL had announced their intentions to join the USPHL Midwest. On April 29, 2015, it was announced that the league had disbanded for the 2015-16 season. On May 21, 2015, the Rochester Ice Hawks were approved to join the North American 3 Hockey League to begin playing in the 2015–16 season. In June, the Wooster Oilers would drop out of the USPHL and only field a team in the NA3HL using the Cleveland Jr. Lumberjacks franchise it had purchased on February 12, 2015. Prior to starting their first season in the USPHL, the Ironwood Fighting Yoopers and Minnesota Owls announced they would go dormant for the 2015–16 season due to lack of players, the Crystal Lake Rampage were replaced with the Chicago Cougars, the Fort Wayne Federals were replaced with the Indiana Attack but ceased operations prior to their first season, the Hudson Crusaders were renamed the SCV Magicians, the St. Louis Frontenacs were renamed the St. Louis Storm but ceased operations prior to their first season, and the Maple Grove Energy were relocated to become the Blaine Energy
