Joseph Brennan
| Election | Party | Share | 1st Pref | Quotas | Elected |
| 1949 bye-election - Donegal West |  | 47.4% | 12700 | 0.95 | |
| 1951 general election - Donegal West | | 29.7% | 8023 | 1.19 |  |
| 1954 general election - Donegal West | | 26.8% | 6748 | 1.07 | |
| 1955 Local Election - Donegal | | 15.7% | 1840 | 1.10 | |
| 1957 general election - Donegal West | | 27.5% | 6153 | 1.10 | |
| 1961 general election - Donegal South–West | | 29.8% | 7045 | 1.19 | |
| 1965 general election - Donegal South–West | | 27.3% | 7020 | 1.09 | |
| 1969 general election - Donegal–Leitrim | | 50.7% | 14108 | 1.52 | |
| 1973 general election - Donegal–Leitrim | | 36.4% | 10240 | 1.09 | |
| 1977 general election - Donegal | | 10.6% | 6448 | 0.64 | |