Thomas O'Sullivan was an Irish sportsperson who played hurling with the Cork senior inter-county team in the 1950s. At club level, O'Sullivan played for Buttevant.
O'Sullivan, who played in the corner-forward position, first came to prominence with the Cork senior hurlers in the early 1950s. He was a member of the Cork team that defeated Galway in the 1953 All-Ireland Senior Hurling Championship final. In 1954, O'Sullivan was a member of the Cork team that won the Munster Senior Hurling Championship final against Tipperary. He came on as a substitute during Cork's subsequent victory over Wexford in the 1954 All-Ireland Senior Hurling Championship final.