Diarmuid Duggan (born 1980) is an Irish former Gaelic football player and manager who played for club side Ilen Rovers, at the divisional level with Carbery and inter-county level with the Cork senior football team. He usually lined out at right corner-back.

Duggan first came to Gaelic football prominence with the Ilen Rovers club in West Cork, with whom he won an All-Ireland Club Championship medal in the intermediate grade in 2004. He had earlier won county junior and intermediate medals. Duggan first played for Cork at minor and under-21 levels, while he won an All-Ireland Junior Championship title in 2001. He subsequently progressed onto the Cork senior team and won two Munster Championship medals and was a substitute when Cork wwasbeaten by Kerry in the 2007 All-Ireland final. As a player with Munster, Duggan won a Railway Cup medal in 2008. A series of injuries brought an end to his playing career, and he turned to coaching and team management with his home club.