The 2011–12 season was Peterhead's first season back in the Scottish Third Division, having been relegated from the Scottish Second Division at the end of the 2010–11 season.
[1] Peterhead also competed in the Challenge Cup, League Cup and the Scottish Cup.
Peterhead finished fifth in the Third Division.
[2] They reached the second round of the Scottish Challenge Cup,[3] the first round of the League Cup[4] and the fourth round of the Scottish Cup,[5] losing 3–0 to Scottish Premier League side Celtic at Balmoor.
[6] Win Draw Loss Postponed Includes all competitive matches.