South Dublin County Council: 1991 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fianna Fáil |  | 7 | (-6) | 16179 | 29.0% | (-13.1%) | 22 | 7 | ||
| Fine Gael |  | 6 | (-2) | 10298 | 18.5% | (-6.9%) | 13 | (-5) | 7 | |
| Labour Party |  | 4 | (+2) | 9674 | 17.4% | (+5.4%) | 13 | (-1) | 7 | |
| Progressive Democrats |  | 4 | (+4) | 5080 | 9.1% | (+9.1%) | 6 | (+6) | 5 | (+5) |
| Workers' Party |  | 3 | (+1) | 4842 | 8.7% | (+1.6%) | 6 | 6 | ||
| Independent |  | 1 | 4169 | 7.5% | (+1.4%) | 8 | 6 | |||
| Green Party |  | 1 | (+1) | 3294 | 5.9% | (+5.9%) | 6 | (+6) | 6 | (+6) |
| Sinn Féin |  | 0 | 2040 | 3.7% | (-0.9%) | 5 | (+1) | 5 | (+1) | |
| Republican Sinn Féin |  | 0 | 125 | 0.2% | (+0.2%) | 1 | (+1) | 1 | (+1) | |