Longford County Council: 1979 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fine Gael |  | 9 | (+1) | 6346 | 38.9% | (-2.1%) | 17 | (+2) | 5 | |
| Fianna Fáil |  | 8 | 6808 | 41.7% | (+3.1%) | 16 | (+1) | 5 | ||
| Independent |  | 2 | (-2) | 2025 | 12.4% | (-3.0%) | 8 | (+2) | 5 | |
| Sinn Féin |  | 2 | (+1) | 917 | 5.6% | (+2.7%) | 2 | (+1) | 2 | (+1) |
| Sinn Féin (Workers' Party) |  | 0 | 232 | 1.4% | (+1.4%) | 2 | (+2) | 1 | (+1) | |