The 2012–13 Hong Kong Reserve Division League was the fifty-fifth season since the establishment of the Hong Kong Reserve Division League.
The events in the senior league during the 2011–12 season saw Sham Shui Po and Hong Kong Sapling relegated and replaced by Southern and Yokohama FC Hong Kong.
(C) = Champion; (R) = Relegated; (P) = Promoted; (O) = Play-off winner; (A) = Advances to a further round.
Updated to games played on 15 May 2013 Source: Fixtures - Reserve Division 1 The home team is listed in the left-hand column.
1Since Yokohama FC Hong Kong Reserves breached the rule of game, the Hong Kong Football Association awarded Biu Chun Rangers Reserves a 3–0 win.