The 1965–66 IHL season was the 21st season of the International Hockey League, a North American minor professional league. Six teams participated in the regular season, and the Port Huron Flags won the Turner Cup.

Regular season

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GP W L T GF GA Pts
Muskegon Mohawks 70 46 19 5 376 314 97
Fort Wayne Komets 70 38 26 6 312 259 82
Port Huron Flags 70 34 32 4 308 274 72
Dayton Gems 70 33 35 2 347 322 68
Des Moines Oak Leafs 70 29 40 1 263 319 59
Toledo Blades 70 20 48 2 248 366 42

Turner Cup-Playoffs

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Turner-Cup-Semifinals Turner-Cup-Final
      
1 Muskegon Mohawks 0
3 Port Huron Flags 4
3 Port Huron Flags 4
4 Dayton Gems 1
2 Fort Wayne Komets 2
4 Dayton Gems 4
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