William John Clancy (17 June 1906 - 14 December 1967) was an Irish hurler who played as a left corner-forward for the Cork senior team.
Born in Mallow, County Cork, Clancy first arrived on the inter-county scene at the age of twenty-one when he first linked up with the Cork senior team.
He joined the senior panel during the 1928 championship.
Clancy subsequently became a regular member of the starting fifteen, and won one All-Ireland medal, one Munster medal and one National Hurling League medal.
Clancy was a member of the Munster inter-provincial team on a number of occasions, however, he never won a Railway Cup medal.
At club level Clancy enjoyed a lengthy career with Mallow.
Throughout his career Clancy made 15 championship appearances.
He retired from inter-county hurling following the conclusion of the 1934 championship.