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The Ontario Hockey Association (OHA) is the governing body for the majority of junior and senior level ice hockey teams in the province of Ontario. Founded in 1890, the OHA is sanctioned by the Ontario Hockey Federation along with the Northern Ontario Hockey Association. Other Ontario sanctioning bodies along with the OHF include the Hockey Eastern Ontario and Hockey Northwestern Ontario. The OHA controls three tiers of junior hockey; the "Tier 2 Junior "A", Junior "B" , Junior "C", and one senior hockey league, Allan Cup Hockey.
In 1980, the Ontario Major Junior Hockey League vacated what was known as Tier I Junior "A" hockey. The league is now known as the Ontario Hockey League. Although it is not a charter member of the OHA, the OHL is affiliated with the OHA and Ontario Hockey Federation.