Adelbert "Del" St. John (October 6, 1931 – December 18, 2009) was a Canadian-Austrian professional ice hockey player.

St. John, a forward, scored 17 goals and 16 assists in 31 games for the Nottingham Panthers of the British National League.

St. John competed as a member of the Austria men's national ice hockey team at the 1964 and 1968 Winter Olympic Games.

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