The 2009–10 OJAHL season is the first and only season of the Ontario Junior A Hockey League (OJAHL). The 15 teams of the OJAHL competed in 56 regular season games, the top eight teams in the league competed in the playoffs for the league championship.
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
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