Statistics of League of Ireland in the 1997–98 season.
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The Premier Division was contested by 12 teams and St Patrick's Athletic F.C. won the championship.
The First Division was contested by 10 teams and Waterford United F.C. won the division.
| Pos | Club | Pts | W | D | L | GF | GA | GD | |
| 1 | St Patrick's Athletic F.C. | 68 | 19 | 11 | 3 | 46 | 24 | +22 | |
| 2 | Shelbourne F.C. | 67 | 20 | 7 | 6 | 58 | 32 | +26 | |
| 3 | Cork City F.C. | 53 | 14 | 11 | 8 | 50 | 40 | +10 | |
| 4 | Shamrock Rovers F.C. | 52 | 14 | 10 | 9 | 41 | 32 | +9 | |
| 5 | Bohemian F.C. | 50 | 13 | 11 | 9 | 50 | 36 | +14 | |
| 6 | Dundalk F.C. | 45 | 12 | 9 | 12 | 41 | 43 | -2 | |
| 7 | Sligo Rovers F.C. | 44 | 10 | 14 | 9 | 46 | 49 | -3 | |
| 8 | Finn Harps F.C. | 43 | 12 | 7 | 14 | 41 | 43 | -2 | |
| 9 | Derry City F.C. | 40 | 10 | 10 | 13 | 30 | 31 | -1 | |
| 10 | University College Dublin A.F.C. | 39 | 9 | 12 | 12 | 36 | 38 | -2 | Play-off(Won) |
| 11 | Kilkenny City A.F.C. | 19 | 4 | 7 | 22 | 27 | 63 | -36 | Relegated |
| 12 | Drogheda United F.C. | 15 | 2 | 9 | 22 | 20 | 55 | -35 | Relegated |
| Pos | Club | Pts | W | D | L | GF | GA | GD | |
| 1 | Waterford United F.C. | 60 | 18 | 6 | 3 | 35 | 17 | +18 | Promoted |
| 2 | Bray Wanderers A.F.C. | 54 | 17 | 3 | 7 | 51 | 21 | +30 | Promoted |
| 3 | Limerick F.C. | 50 | 14 | 8 | 5 | 41 | 25 | +16 | Play-off(Lost) |
| 4 | Galway United F.C. | 43 | 13 | 4 | 10 | 38 | 29 | +9 | |
| 5 | Home Farm Everton F.C. | 38 | 9 | 11 | 7 | 28 | 22 | +6 | |
| 6 | Cobh Ramblers F.C. | 35 | 10 | 5 | 12 | 32 | 41 | -9 | |
| 7 | Athlone Town A.F.C. | 31 | 8 | 7 | 12 | 31 | 37 | -6 | |
| 8 | St Francis F.C. | 29 | 7 | 8 | 12 | 29 | 40 | -11 | |
| 9 | Monaghan United F.C. | 22 | 6 | 4 | 17 | 26 | 44 | -18 | |
| 10 | Longford Town F.C. | 12 | 2 | 6 | 19 | 12 | 47 | -35 |
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