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Information
| Pairings & results
| Crosstable
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| 9th
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Round 9
20 July 1980
| Cassidy (5) |
½-½ |
Delaney (6½) |
| Porter (5½) |
0-1 |
Clarke (5) |
| Littleton (4½) |
1-0 |
Wallace (4½) |
| Curtin (5) |
0-1 |
Ludgate (4½) |
| Killane (4½) |
1-0 |
Carton (4½) |
| Allen (4½) |
1-0 |
Short (4½) |
| McDonnell (4½) |
½-½ |
McCarthy (3½) |
| McDaid (3½) |
½-½ |
O'Reilly (3½) |
| Quinn (2½) |
½-½ |
O'Shea (3½) |
| McGill (3½) |
0-1 |
O'Brien (3) |
| Pinkerton (2½) |
0-1 |
Lyons (3) |
| O'Hare (3½) |
½-½ |
Cronin (1) |
Scores after round 9 (final round)
| Delaney | 7 |
| Clarke | 6 |
| Porter | 5½ |
| Allen | 5½ |
| Cassidy | 5½ |
| Killane | 5½ |
| Littleton | 5½ |
| Ludgate | 5½ |
| Curtin | 5 |
| McDonnell | 5 |
| Carton | 4½ |
| Short | 4½ |
| Wallace | 4½ |
| Lyons | 4 |
| McCarthy | 4 |
| McDaid | 4 |
| O'Brien | 4 |
| O'Hare | 4 |
| O'Reilly | 4 |
| O'Shea | 4 |
| McGill | 3½ |
| Quinn | 3 |
| Pinkerton | 2½ |
| Cronin | 1½ |