The 1998–99 OPJHL season is the sixth season of the Ontario Provincial Junior A Hockey League (OPJHL). The thirty-seven teams of the Central, East, and West divisions competed in a 51-game schedule. The top eight of each division made the Buckland Cup playoffs. The winner of the Buckland Cup, the Bramalea Blues, won the 1999 Dudley Hewitt Cup as Central Canadian Champions, but failed to win the 1999 Royal Bank Cup.

Changes

Final standings

Note: 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

1998-99 Frank L. Buckland Trophy Playoffs

Division Quarter-final Division Semi-final Division Final Semi-final (*) denotes that the Merchants were welcomed back into the playoffs for another round despite losing due to their superior playoff winning percentage over Couchiching and Lindsay. Final

Dudley Hewitt Cup Championship

Best-of-7 series

1999 Royal Bank Cup Championship

The 1999 Royal Bank Cup was hosted by the Yorkton Terriers of Yorkton, Saskatchewan. The Bramalea Blues were defeated in the semi-final. Round Robin Semi-final

Scoring leaders

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