The Greater Ontario Junior Hockey League (GOJHL) is a Canadian junior ice hockey league based in Southern Ontario, Canada. The league is sanctioned by the Ontario Hockey Association, Ontario Hockey Federation, and Hockey Canada. The league is considered Junior B by the OHA, although it has attempted several times to be promoted to Junior A.

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.