1973 Galway Senior Hurling Championship

The 1973 Galway Senior Hurling Championship was the 76th completed staging of the Galway Senior Hurling Championship since its establishment by the Galway County Board in 1887.
Castlegar entered the championship as the defending champions.
The [|final], a replay, was played on 26 August 1973 at Duggan Park in Ballinasloe, between Castlegar and Ballinasloe, in what was their second meeting in the final overall. Castlegar won the match by 4–11 to 3–10 to claim their 15th championship title overall and a second consecutive title.