The 1978 All-Ireland Under-21 Football Championship was the 15th staging of the All-Ireland Under-21 Football Championship since its establishment by the Gaelic Athletic Association in 1964.
Kerry entered the championship as defending champions in search of a record-breaking fourth successive All-Ireland title.
On 15 October 1978, Roscommon won the championship following a 1-9 to 1-8 defeat of Kerry in the All-Ireland final.[1] This was their second All-Ireland title overall and their first in 12 championship seasons.
Semi-finals
Final