The thirty-five teams of the North, South, East, and West divisions competed in a 49-game schedule.
Come February, the top eight teams of each division competed for the Frank L. Buckland Trophy, the OPJHL championship.
The Dukes were not successful in winning the 2003 Royal Bank Cup.
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 Division Quarter-final Division Semi-final Division Final Semi-final Final Hosted by Fort Frances Borderland Thunder in Fort Frances, Ontario.
[2] Round Robin Semi-final Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes