The 1979–80 All-Ireland Senior Club Football Championship was the 10th staging of the All-Ireland Senior Club Football Championship since its establishment by the Gaelic Athletic Association in 1970-71. Nemo Rangers were the defending champions, however, they failed to qualify after being beaten by Castlehaven in the 1979 Cork County Championship. On 25 May 1980, St. Finbarr's won the championship following a 3-09 to 0-08 defeat of St. Grellan's in the All-Ireland final at Seán Treacy Park. It was their first ever championship title.