1999–2000 OHL season

The season was the first to award a point for an overtime loss.

The Barrie Colts won the J. Ross Robertson Cup, defeating the Plymouth Whalers.

Note: DIV = Division; GP = Games played; W = Wins; L = Losses; T = Ties; OTL = Overtime losses; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched division title; z = clinched conference title Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes [1] 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 [2]

Defencemen Wingers Centres Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes [4] 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 [5] On June 3, 2000, the OHL conducted the 2000 Ontario Hockey League Priority Selection at the Hershey Centre in Mississauga, Ontario.

The Mississauga IceDogs held the first overall pick in the draft, and selected Patrick Jarrett from the Soo Thunderbirds.