The Guelph Platers were a junior ice hockey team based in Guelph, Ontario, Canada. The team played in the Ontario Hockey League, Ontario Junior Hockey League, and Southern Ontario Junior A Hockey League. They were originally known as the CMC's until 1972, the Biltmore Mad Hatters until 1975, and then took on the name Platers. The Platers were promoted to the Ontario Hockey League in 1982 and moved to Owen Sound in 1989. The franchise played in the Guelph Memorial Gardens.
In 1970, the Junior A level was divided into two more levels, Tier I and Tier II. In 1974, the "Major Junior A" division of the OHA became the Ontario Major Junior Hockey League (OMJHL) and began to operate independently of the OHA. Finally in 1980, the OMJHL became the Ontario Hockey League.
The Streetsville Derbys are a Junior "C" ice hockey team from Streetsville, Ontario, Canada. They are a part of the Provincial Junior Hockey League assigned to the South Conference and in the Bloomfield Division. The Derbys joined the PJHL as an expansion franchise for the 2024–25 season.
The Port Colborne Sailors are a Canadian junior ice hockey team based in Port Colborne, Ontario. They played in the Golden Horseshoe division of the Greater Ontario Junior Hockey League.
The Brantford Eagles were a Canadian junior ice hockey team based in Brantford, Ontario, Canada. They played in the Mid-Western Conference of the Greater Ontario Junior Hockey League.
The Cambridge Winter Hawks were a Canadian junior ice hockey team based in Cambridge, Ontario, Canada. They played in the Mid-Western division of the Greater Ontario Junior Hockey League.
The Elmira Sugar Kings are a junior ice hockey team based in Elmira, Ontario, Canada. They play in the Mid-Western division of the Greater Ontario Junior Hockey League.
The Listowel Cyclones are a junior ice hockey team based in Listowel, Ontario, Canada. They play in the Mid-Western division of the Greater Ontario Junior Hockey League. They currently play at the Steve Kerr Memorial Complex.
The Stratford Warriors are a junior ice hockey team based in Stratford, Ontario, Canada. They play in the Mid-Western division of the Greater Ontario Junior Hockey League. The team was originally named the Warriors but was changed to Cullitons in 1975 in honour of the team sponsor the Culliton brothers. The sponsorship from the Culliton brothers ended in 2016, bringing the name "Warriors" back to the city.
The Kitchener-Waterloo Siskins are a junior ice hockey team based in Waterloo, Ontario, Canada. They play in the Mid-Western division of the Greater Ontario Junior Hockey League.
The Niagara Falls Canucks are a junior ice hockey team based in Niagara Falls, Ontario, Canada. They play in the Ontario Junior Hockey League which they joined in 2023. For most of the team's history they had played in the Golden Horseshoe division of the Greater Ontario Junior Hockey League until leaving for the OJHL.
The St. Thomas Stars are a Canadian junior ice hockey team based in St. Thomas, Ontario, Canada. The team plays in the Western division of the Greater Ontario Junior Hockey League.
The Chatham Maroons are a junior ice hockey team based in Chatham, Ontario, Canada. They play in the Western division of the Greater Ontario Junior Hockey League (GOJHL). The Maroons were the 1970 Western Ontario Junior A Champions and 1973 Southern Ontario Junior A Champions. The Maroons have won multiple Junior B league titles and the 1999 Sutherland Cup as Ontario Hockey Association Junior B Champions. In the 2021-2022 season, the Maroons won the GOJHL Western Conference Championship 4-2 over the Leamington Flyers. The Maroons dedicated their Championship in honour of their longtime equipment manager and team volunteer, Randy DeWael, who died suddenly during the playoffs.
The LaSalle Vipers are a Canadian junior ice hockey team based in LaSalle, Ontario, Canada. They play in the Western division of the Greater Ontario Junior Hockey League. As a franchise, the Vipers are two-time Sutherland Cup provincial champions, two-time Great Lakes champions and five-time Western Ontario champions.
The Ontario Hockey Association Senior A League was a top tier Canadian senior ice hockey league in Ontario from 1890 until 1979. The league was sanctioned by the Ontario Hockey Association and the Canadian Amateur Hockey Association and its clubs competed for the Allan Cup.
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 Caledonia Corvairs were a Canadian junior hockey team based in Caledonia, Ontario, Canada. They were playing in the Niagara & District Junior C Hockey League.
The Hespeler Shamrocks are a junior ice hockey team based in Hespeler, Ontario, Canada. They are currently members of the Provincial Junior Hockey League. The team was known as the Simcoe Storm from 1989-2017 and had played in Simcoe, Ontario since 1959 before relocating in 2018.
The Caledonia Corvairs are a Canadian junior ice hockey team based in Caledonia, Ontario, Canada. They played in the Golden Horseshoe Conference of the Greater Ontario Junior Hockey League. The team announced it would not participate in the 2018–19 season.
The Brantford Bandits are a Canadian junior ice hockey team based in Brantford, Ontario, Canada. They play in the Mid-Western Conference of the Greater Ontario Junior Hockey League.
