Denis Mulcahy (born 15 August 1956) is an Irish retired hurler who played as a right corner-back for the Cork senior team. Born in Midleton, County Cork, Mulcahy first played competitive hurling during his schooling at Midleton CBS. He arrived on the inter-county scene at the age of twenty when he first linked up with the Cork under-21 team. He made his senior debut during the 1980-81 league. Mulcahy subsequently became a regular member of the starting fifteen and won two All-Ireland medals, four Munster medals and one National Hurling League medal. He was an All-Ireland runner-up on one occasion.