List of OJHL seasons

OHA Junior "A"

SOJHL	(1970-1977)
OPJHL	(1972–1987)
MetJHL	(1991-1998)
OJHL	(1993–Present)
Ontario Hockey Association
Canadian Junior Hockey League

This is a list of Ontario Hockey Association Junior A seasons since the inception of modern Junior A hockey in 1970.

In 1970, in Ontario, what would become the Ontario Hockey League vacated the rank of Junior A and declared itself "Major Junior" and eventually became separate from OHA jurisdiction. The remaining Junior A leagues in Ontario remained at the Junior A level, such as the Thunder Bay Junior A Hockey League of the Thunder Bay Amateur Hockey Association, the Northern Ontario Junior Hockey Association of the Northern Ontario Hockey Association, and the Central Junior A Hockey League of the Ottawa District Hockey Association. The departure of the Ontario Major Junior Hockey League left the Ontario Hockey Association with no available Junior A league. An independent league, the Western Ontario Junior A Hockey League, was negotiated with and eventually joined the OHA as the Southern Ontario Junior A Hockey League. In 1972, a rival league was created for the SOJHL called the Ontario Provincial Junior A Hockey League, the OPJHL was created by taking the top teams from the Metro Junior B Hockey League. In 1977 the SOJHL folded and in 1981 the OPJHL became the Ontario Junior Hockey League. This league dwindled in size and folded in 1987.