1991 Offaly Senior Hurling Championship
| Champions | Birr (11th title) Brian Whelehan (captain) | ||
|---|---|---|---|
| Runners-up | Seir Kieran Mick Coughlan (captain) | ||
| |||
The 1991 Offaly Senior Hurling Championship was the 94th staging of the Offaly Senior Hurling Championship since its establishment by the Offaly County Board in 1896.
St Rynagh's were the defending champions.
The final was played on 13 October 1991 at St Brendan's Park in Birr, between Birr and Seir Kieran, in what was their first ever meeting in the final. Birr won the match by 1–12 to 1–11 to claim their 11th championship title overall and a first title in 20 years.