Electorate: 1,709,161
Total Valid Poll: 1,107,005
Percentage poll: 65.3%
Spoiled votes: 9,910
Total poll: 1,116,915
Quota: 553,503
| Candidates | First Count |
|---|---|
| De Valera, Éamon | 558,861 |
| O’Higgins, Thomas F | 548,144 |
Mr de Valera was declared elected and was inaugurated as President on 25 June 1966.