The 1984 All-Ireland Senior B Hurling Championship was the 11th staging of Ireland's secondary hurling knock-out competition. Westmeath won the centenary year championship, beating London 4–10 to 1–16 in the final at the Emerald GAA Grounds, Ruislip.

References

Donegan, Des, The Complete Handbook of Gaelic Games (DBA Publications Limited, 2005).