Sligo County Council: 1979 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fine Gael |  | 11 | 11724 | 42.5% | (-3.8%) | 20 | (-1) | 4 | ||
| Fianna Fáil |  | 10 | 11164 | 40.5% | (+0.3%) | 15 | (-1) | 4 | ||
| Independent |  | 2 | 3161 | 11.5% | (+3.7%) | 6 | (-1) | 3 | (+1) | |
| Labour Party |  | 1 | 650 | 2.4% | (-2.1%) | 2 | (-4) | 1 | (-2) | |
| Sinn Féin |  | 0 | 540 | 2.0% | (+1.4%) | 2 | (+1) | 2 | (+1) | |
| Workers' Party |  | 0 | 167 | 0.6% | (+0.0%) | 1 | (+1) | 1 | (+1) | |
| Sinn Féin (Workers' Party) |  | 0 | 167 | 0.6% | (+0.6%) | 2 | (+2) | 1 | (+1) | |