The 2015 Oakland Athletics season was the 48th for the franchise in Oakland, as well as the 115th in club history.

On November 28, 2014, the Athletics traded Josh Donaldson to the Toronto Blue Jays for Brett Lawrie, Kendall Graveman, Sean Nolin, and Franklin Barreto.

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Infielders Outfielders Coaches Note: G = Games played; AB = At bats; R = Runs scored; H = Hits; 2B = Doubles; 3B = Triples; HR = Home runs; RBI = Runs batted in; BB = Base on balls; SO = Strikeouts; AVG = Batting average; SB = Stolen bases Note: W = Wins; L = Losses; ERA = Earned run average; G = Games pitched; GS = Games started; SV = Saves; IP = Innings pitched; H = Hits allowed; R = Runs allowed; ER = Earned runs allowed; HR = Home runs allowed; BB = Walks allowed; K = Strikeouts LEAGUE CHAMPIONS: Midland[3]