The 1980 All-Ireland Senior B Hurling Championship was the seventh staging of the All-Ireland Senior B Hurling Championship since its establishment by the Gaelic Athletic Association in 1974. The championship ran from 11 May to 6 July 1980.
The All-Ireland final was played at the Croke Park in Dublin on 6 July 1980 between Kildare and London, in what was their first ever meeting in the All-Ireland final. Kildare won the match by 2-20 to 2-14 to claim their second All-Ireland title overall and a first title in six years.
Kildare's Johnny Walsh was the championship's top scorer with 0-34.