Mayo County Council: 1979 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fine Gael |  | 16 | (+3) | 25381 | 44.0% | (-1.7%) | 22 | (-2) | 6 | |
| Fianna Fáil |  | 15 | 28132 | 48.8% | (+5.3%) | 23 | 6 | |||
| Independent |  | 0 | (-3) | 3155 | 5.5% | (-4.1%) | 7 | (-3) | 4 | (-1) |
| Labour Party |  | 0 | 475 | 0.8% | (-0.5%) | 2 | 2 | |||
| Sinn Féin (Workers' Party) |  | 0 | 323 | 0.6% | (+0.6%) | 1 | (+1) | 1 | (+1) | |
| Sinn Féin |  | 0 | 209 | 0.4% | (+0.4%) | 1 | (+1) | 1 | (+1) | |