Its 18 members are in SeaKing District II, which includes Seattle and east King County.
The first WIAA state meet in boys basketball was in 1923 but it wasn't until 1945 that the Metro League allowed its schools to compete.
Lincoln defeated Bellingham High School 50-38 to win the state championship that year.
[2] The first state meet in boys track and field took place in 1924 but it wasn't until 1959 that Metro League schools were allowed to compete.
New Seattle Public Schools to join during this time were Rainier Beach in 1960 and Nathan Hale in 1963.
This changed in the 1970's as Bishop Blanchet, Holy Names, Lakeside, O'Dea, and Seattle Prep all joined the Metro League.
Further additions to the Metro League include the private school Eastside Catholic in 1989 and Bainbridge Island in 2001.
[6] Starting in the 1997-98 school year, Franklin, Garfield, and Roosevelt all left the Metro League to join the KingCo 4A Conference.
[7] In the 2002-03 school year Ballard would also leave the Metro League and join the KingCo 4A Conference.
[11] The Metro League football champion was awarded the Leon Brigham Trophy, originally donated by Royal Brougham.