The Oakland Athletics all–time roster is a list of people who have played at least one game for the Oakland Athletics, Kansas City Athletics, or Philadelphia Athletics baseball teams of the American League, along with their primary position and years played for the team. It does not include players for the 1871–76 Philadelphia Athletics, the 1882–1890 Philadelphia Athletics, or the 1891 Philadelphia Athletics. The only Athletics player with no regular season appearances is Mark Kiger who only played for Oakland during two games in the 2006 American League Championship Series.