2017–18 OHL season

The 2017–18 OHL season was the 38th season of the Ontario Hockey League, in which twenty teams played 68 games each according to the regular season schedule, from September 21, 2017 to March 18, 2018. The Sault Ste. Marie Greyhounds accomplished a streak of 23 consecutive wins between October 27, 2017 and January 4, 2018.

The Hamilton Bulldogs won the J. Ross Robertson Cup as they defeated the Sault Ste. Marie Greyhounds in six games to represent the Ontario Hockey League at the 2018 Memorial Cup, which was hosted by the Regina Pats of the WHL at the Brandt Centre in Regina, Saskatchewan from May 18–27, 2018.

Final standings
Note: DIV = Division; GP = Games played; W = Wins; L = Losses; OTL = Overtime losses; SL = Shootout losses; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched division title; z = clinched conference title

Scoring leaders
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes

Leading goaltenders
Note: GP = Games played; Mins = Minutes played; W = Wins; L = Losses: OTL = Overtime losses; SL = Shootout losses; GA = Goals Allowed; SO = Shutouts; GAA = Goals against average

(3) Kingston Frontenacs vs. (6) North Bay Battalion
*Note: Game 3 has been moved to Sudbury Community Arena, because the North Bay Memorial Gardens hasn't been ready in time after hosting the 2018 Ford World Women's Curling Championship.

Playoff scoring leaders
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes

Playoff leading goaltenders
Note: GP = Games played; Mins = Minutes played; W = Wins; L = Losses: OTL = Overtime losses; SL = Shootout losses; GA = Goals Allowed; SO = Shutouts; GAA = Goals against average

All-Star teams
The OHL All-Star Teams were selected by the OHL's General Managers.

First team

 * Morgan Frost, Centre, Sault Ste. Marie Greyhounds
 * Boris Katchouk, Left Wing, Sault Ste. Marie Greyhounds
 * Jordan Kyrou, Right Wing, Sarnia Sting
 * Nicolas Hague, Defence, Mississauga Steelheads
 * Evan Bouchard, Defence, London Knights
 * Michael DiPietro, Goaltender, Windsor Spitfires
 * Drew Bannister, Coach, Sault Ste. Marie Greyhounds

Second team

 * Aaron Luchuk, Centre, Windsor Spitfires/Barrie Colts
 * Sam Miletic, Left Wing, London Knights/Niagara IceDogs
 * Taylor Raddysh, Right Wing, Sault Ste. Marie Greyhounds
 * Sean Durzi, Defence, Owen Sound Attack
 * Conor Timmins, Defence, Sault Ste. Marie Greyhounds
 * Jeremy Helvig, Goaltender, Kingston Frontenacs
 * Dale Hawerchuk, Coach, Barrie Colts

Third team

 * Gabriel Vilardi, Centre, Kingston Frontenacs
 * Adam Mascherin, Left Wing, Kitchener Rangers
 * Jason Robertson, Right Wing, Kingston Frontenacs
 * Cam Dineen, Defence, Sarnia Sting
 * Joey Keane, Defence, Barrie Colts
 * Matthew Villalta, Goaltender, Sault Ste. Marie Greyhounds
 * Trevor Letowski, Coach, Windsor Spitfires

2018 OHL Priority Selection
On April 7, 2018, the OHL conducted the 2018 Ontario Hockey League Priority Selection. The Sudbury Wolves held the first overall pick in the draft, and selected Quinton Byfield from the York-Simcoe Express of the OMHA. Byfield was awarded the Jack Ferguson Award, awarded to the top pick in the draft.

Below are the players who were selected in the first round of the 2018 Ontario Hockey League Priority Selection.

2018 NHL Entry Draft
On June 22-23, 2018, the National Hockey League conducted the 2018 NHL Entry Draft held at the American Airlines Center in Dallas, Texas. In total, 35 players from the Ontario Hockey League were selected in the draft. Andrei Svechnikov of the Barrie Colts was the first player from the OHL to be selected, as he was taken with the second overall pick by the Carolina Hurricanes.

Below are the players selected from OHL teams at the NHL Entry Draft.

2018 CHL Import Draft
On June 28, 2018, the Canadian Hockey League conducted the 2018 CHL Import Draft, in which teams in all three CHL leagues participate in. The Sudbury Wolves held the first pick in the draft by a team in the OHL, and selected Ukko-Pekka Luukkonen from Finland with their selection.

Below are the players who were selected in the first round by Ontario Hockey League teams in the 2018 CHL Import Draft.