Sligo Corporation: 1999 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fianna Fáil |  | 4 | (+1) | 2801 | 32.2% | (+7.7%) | 9 | (+1) | 3 | |
| Fine Gael |  | 3 | 1990 | 22.8% | (-2.9%) | 5 | (-1) | 3 | ||
| Sinn Féin |  | 3 | (+1) | 1519 | 17.4% | (+3.7%) | 3 | (+1) | 3 | (+1) |
| Labour Party |  | 2 | 1508 | 17.3% | (+0.1%) | 4 | (-3) | 3 | ||
| Independent |  | 0 | (-2) | 687 | 7.9% | (-10.0%) | 5 | (-4) | 3 | |
| Progressive Democrats |  | 0 | 206 | 2.4% | (+1.3%) | 3 | (+2) | 3 | (+2) | |