The 1939 All-Ireland Junior Hurling Championship was the 22nd staging of the All-Ireland Junior Championship since its establishment by the Gaelic Athletic Association in 1912.
London entered the championship as the defending champions.
The All-Ireland final was played on 8 October 1939 at Croke Park in Dublin, between Galway and London, in what was their first ever meeting in a final. Galway won the match by 2-06 to 2-02 to claim their first ever championship title. 
Results.
All-Ireland Junior Hurling Championship.
All-Ireland semi-finals.
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All-Ireland home finals.
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All-Ireland final.
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References.
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