Mayo County Council: 1991 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fianna Fáil |  | 15 | 25672 | 47.3% | (-5.3%) | 22 | (-3) | 6 | ||
| Fine Gael |  | 13 | (-1) | 21656 | 39.9% | (+0.9%) | 19 | (-4) | 6 | |
| Independent |  | 2 | 3484 | 6.4% | (+0.1%) | 7 | (+4) | 4 | (+2) | |
| Labour Party |  | 1 | (+1) | 1949 | 3.6% | (+2.8%) | 4 | (+2) | 4 | (+3) |
| Progressive Democrats |  | 0 | 1531 | 2.8% | (+2.8%) | 3 | (+3) | 3 | (+3) | |