Sligo County Council: 1999 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fine Gael |  | 11 | 11849 | 39.1% | (+4.8%) | 15 | (+1) | 5 | ||
| Fianna Fáil |  | 9 | (-2) | 10656 | 35.2% | (-9.2%) | 17 | (-4) | 5 | |
| Independent |  | 2 | 3497 | 11.5% | (+1.7%) | 5 | (-1) | 3 | (-1) | |
| Labour Party |  | 2 | (+2) | 2859 | 9.4% | (+6.1%) | 5 | (+2) | 3 | |
| Sinn Féin |  | 1 | (+1) | 1206 | 4.0% | (+2.4%) | 1 | 1 | ||
| Progressive Democrats |  | 0 | 212 | 0.7% | (-0.3%) | 2 | (+1) | 1 | ||