The 1979–80 OMJHL season was the sixth season of the Ontario Major Junior Hockey League. The OMJHL inaugurates the Bobby Smith Trophy, named after Bobby Smith, awarded to the scholastic player of the year. Twelve teams each played 68 games. The Peterborough Petes won the J. Ross Robertson Cup, defeating the Windsor Spitfires.
| City | Arena | Capacity | Head coach | ||
|---|---|---|---|---|---|
| Leyden Division | |||||
| Kingston Canadians | Kingston, Ontario | Kingston Memorial Centre | 3,300 | Jim Morrison | |
| Oshawa Generals | Oshawa, Ontario | Oshawa Civic Auditorium | 4,025 | Paul Theriault | |
| Ottawa 67's | Ottawa, Ontario | Ottawa Civic Centre | 9,000 | Brian Kilrea | |
| Peterborough Petes | Peterborough, Ontario | Peterborough Memorial Centre | 4,000 | Mike Keenan | |
| Sault Ste. Marie Greyhounds | Sault Ste. Marie, Ontario | Sault Memorial Gardens | 3,390 | Terry Crisp | |
| Sudbury Wolves | Sudbury, Ontario | Sudbury Community Arena | 5,750 | Andy Laing | |
| Emms Division | |||||
| Brantford Alexanders | Brantford, Ontario | Brantford Civic Centre | 2,981 | Ron Carroll | |
| Kitchener Rangers | Kitchener, Ontario | Kitchener Memorial Auditorium | 5,679 | Bob Ertel Rod Seiling | |
| London Knights | London, Ontario | London Gardens | 5,000 | Bill Long | |
| Niagara Falls Flyers | Niagara Falls, Ontario | Niagara Falls Memorial Arena | 3,633 | Barry Boughner Fred Stanfield | |
| Toronto Marlboros | Toronto, Ontario | Maple Leaf Gardens | 16,316 | Dave Chambers | |
| Windsor Spitfires | Windsor, Ontario | Windsor Arena | 4,400 | Wayne Maxner | |
Note: GP = Games played; W = Wins; L = Losses; T = Ties; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched first round bye; z = clinched division title & first round bye
| Rank | Team | GP | W | L | T | PTS | GF | GA | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 68 | 47 | 20 | 1 | 95 | 316 | 238 | ||
| 2 | 68 | 45 | 20 | 3 | 93 | 402 | 288 | ||
| 3 | 68 | 42 | 26 | 0 | 84 | 329 | 275 | ||
| 4 | 68 | 35 | 26 | 7 | 77 | 320 | 298 | ||
| 5 | 68 | 33 | 33 | 2 | 68 | 299 | 309 | ||
| 6 | 68 | 22 | 45 | 1 | 45 | 281 | 379 |
| Rank | Team | GP | W | L | T | PTS | GF | GA | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 68 | 36 | 31 | 1 | 73 | 323 | 344 | ||
| 2 | 68 | 33 | 32 | 3 | 69 | 342 | 310 | ||
| 3 | 68 | 31 | 35 | 2 | 64 | 412 | 398 | ||
| 4 | 68 | 29 | 39 | 0 | 58 | 325 | 355 | ||
| 5 | 68 | 26 | 38 | 4 | 56 | 328 | 334 | ||
| 6 | 68 | 17 | 51 | 0 | 34 | 276 | 425 |
| Player | Team | GP | G | A | Pts | PIM |
|---|---|---|---|---|---|---|
| 52 | 65 | 101 | 166 | 30 | ||
| 67 | 66 | 93 | 159 | 47 | ||
| 66 | 66 | 84 | 150 | 86 | ||
| 67 | 65 | 84 | 149 | 8 | ||
| 65 | 65 | 70 | 135 | 50 | ||
| 66 | 63 | 67 | 130 | 98 | ||
| 68 | 61 | 68 | 129 | 48 | ||
| 67 | 44 | 78 | 122 | 13 | ||
| 68 | 47 | 74 | 121 | 34 | ||
| 67 | 43 | 76 | 119 | 102 | ||