Monaghan County Council: 1999 Local Election
| Party | Seats | Votes | Share | Candidates | Constituencies | |||||
| Fianna Fáil |  | 8 | 10369 | 38.5% | (-1.6%) | 12 | 4 | |||
| Fine Gael |  | 6 | (-1) | 7018 | 26.1% | (-6.7%) | 9 | 4 | ||
| Sinn Féin |  | 6 | (+4) | 6709 | 24.9% | (+11.0%) | 7 | (+2) | 4 | |
| Independent |  | 0 | (-1) | 1915 | 7.1% | (+2.3%) | 3 | (-1) | 2 | (-2) |
| Green Party |  | 0 | 493 | 1.8% | (+1.8%) | 2 | (+2) | 2 | (+2) | |
| Christian Solidarity |  | 0 | 221 | 0.8% | (+0.8%) | 1 | (+1) | 1 | (+1) | |
| Labour Party |  | 0 | 176 | 0.7% | (+0.7%) | 1 | (+1) | 1 | (+1) | |