§ denotes Regency or interim Presidency
† denotes head of state appointed by military regime
* fled Greece in 1967; de jure Zoitakis and Papadopoulos were regents acting on his behalf until the monarchy was abolished in 1973 during the latter's regency
The junta-proclaimed Republic (1973-1974) is not officially recognised, and the monarchy is considered to have continued de jure until 1974