Mayo County Council: 1974 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fianna Fáil |  | 15 | (-1) | 23522 | 43.5% | (-2.9%) | 23 | (-3) | 6 | |
| Fine Gael |  | 13 | 24724 | 45.7% | (+3.8%) | 24 | (-3) | 6 | ||
| Independent |  | 3 | (+1) | 5164 | 9.5% | (-1.0%) | 10 | (-2) | 5 | (-1) |
| Labour Party |  | 0 | 705 | 1.3% | (+0.1%) | 2 | (-1) | 2 | (-1) | |