Washington Interscholastic Activities Association was created in 1920.
Nevada Interscholastic Activities Association was created in 1922.
Arizona Interscholastic Association was created in 1925.
Massachusetts Interscholastic Athletic Association was created in 1977.
Wisconsin Interscholastic Athletic Association was created in 1895.
Pennsylvania Interscholastic Athletic Association was created in 1913.
District of Columbia Interscholastic Athletic Association was created in 1958.
New Jersey Interscholastic Athletic Association was created in 1896.
New Hampshire Interscholastic Athletic Association was created in 1947.
Pennsylvania Interscholastic Marching Band Association was created in 1993.
New Jersey State Interscholastic Athletic Association was created in 1918.
Interscholastic was created in 1999.
University Interscholastic League was created in 1910.