| Country | Ireland England |
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|---|---|---|---|
| Champions | Antrim | ||
| Runner-up | London | ||
|
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The All-Ireland Senior B Hurling Championship of 1981 was the eighth staging of Ireland's secondary hurling knock-out competition. Antrim won the championship, beating London 3-17 to 3-14 in the final at Fr. Healy Park, Loughguile.