The 1971 All-Ireland Senior Football Championship was the 85th staging of the All-Ireland Senior Football Championship, the Gaelic Athletic Association's premier inter-county Gaelic football tournament. The championship began on 25 April 1971 and ended on 26 September 1971. Kerry entered the championship as the defending champions, however, they were defeated by Cork in the Munster final. On 26 September 1971, Offaly won the championship following a 1-14 to 2-8 defeat of Galway in the All-Ireland final. This was their first All-Ireland title.