The All-Ireland Senior Football Championship 2005, known for sponsorship reasons as the 2005 Bank of Ireland All-Ireland Senior Football Championship was the premier Gaelic football competition in 2005. It consisted of 33 teams and began on Saturday 7 May 2005. Few surprises came during the championship with the dominance of the Ulster teams evident once again. Gaelic football's "Big Three" of this era - Armagh, Kerry, Tyrone - all progressed to the semi-finals.