The 1976–77 OMJHL season was the third season of the Ontario Major Junior Hockey League (OMJHL). The St. Catharines Black Hawks moved to Niagara Falls, Ontario, becoming the Flyers. Their owner Hap Emms using the name of his former team. The Hamilton Fincups then moved to the vacant Jack Gatecliff Arena in St. Catharines, Ontario after the ice-making machine at the ancient Hamilton Forum broke down irreparably a month before the season began. Twelve teams each played 66 games. The Ottawa 67's won the J. Ross Robertson Cup, defeating the London Knights.