| Country | Ireland England |
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|---|---|---|---|
| Champions | London | ||
| Runner-up | KIldare | ||
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The All-Ireland Senior B Hurling Championship of 1990 was the 17th staging of Ireland's secondary hurling knock-out competition. London won the championship, beating Kildare 1-15 to 5-2 in the final at the Emerald GAA Grounds, Ruislip.