The 1966 All-Ireland Minor Football Championship was the 35th staging of the All-Ireland Minor Football Championship, the Gaelic Athletic Association's premier inter-county Gaelic football tournament for boys under the age of 18. Derry entered the championship as defending champions, however, they were defeated by Down in the Ulster final. On 25 September 1966, Mayo won the championship following a 1-12 to 1-8 defeat of Down in the All-Ireland final. This was their third All-Ireland title overall and their first title in 13 championship seasons. Results Connacht Minor Football Championship Quarter-Final Roscommon win over Leitrim. Semi-Finals Mayo 4-1- Sligo 0-7. Roscommon beat Galway. Final Mayo 1-9 Roscommon 0-7 Castlebar. Leinster Minor Football Championship Ulster Minor Football Championship Munster Minor Football Championship All-Ireland Minor Football Championship Semi-Finals Final References 1966 All-Ireland Minor Football Championship