The Northwestern Ontario Junior Hockey League (NWOJHL) was a Canadian junior ice hockey league that spanned the North of Superior region between Sault Ste. Marie and Thunder Bay in the 1960s and 1970s. The league seems to be the forerunner to the Thunder Bay Junior B Hockey League. At times, in the 1960s, the NWOJHL champion was eligible to compete in the Memorial Cup playdowns against the winner of the Thunder Bay Junior A Hockey League.