Mayo County Council: 2004 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fine Gael |  | 15 | (+2) | 27545 | 43.2% | (+1.8%) | 23 | (+3) | 7 | |
| Fianna Fáil |  | 12 | (-4) | 23617 | 37.0% | (-9.2%) | 22 | (-1) | 7 | |
| Independent |  | 2 | (+1) | 7317 | 11.5% | (+3.0%) | 10 | (+2) | 7 | (+2) |
| Sinn Féin |  | 1 | (+1) | 2710 | 4.2% | (+2.7%) | 2 | 2 | ||
| Labour Party |  | 1 | 1439 | 2.3% | (+0.4%) | 2 | (+1) | 2 | (+1) | |
| Progressive Democrats |  | 0 | 881 | 1.4% | (+1.4%) | 1 | (+1) | 1 | (+1) | |
| Green Party |  | 0 | 292 | 0.5% | (-0.1%) | 1 | (-2) | 1 | (-2) | |