Greece: Heads of State: 1863-1924Royal House: Slesvig-Holsten-Sønderborg-Glücksborg |
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| Basileus tōn Hellēnōn (Βασιλεύς των Ελλήνων) | King of the Hellenes | |
| 25 May/6 Jun 1863 - 5/18 Mar 1913 | Geōrgios I (Γεώργιος Αʹ)[1][2] |
| 5/18 Mar 1913 - 30 May/12 Jun 1917 | Kōnstantinos I (Κωνσταντίνος Αʹ) |
| 30 May/12 Jun 1917 - 12/25 Oct 1920 | Alexandros (Αλέξανδρος) |
| Ypourgikon Symboulion: Proedros tou Ypourgikou Symbouliou (Υπουργικόν Συμβούλιον: Πρόεδρος του Υπουργικού Συμβουλίου) | Council of Ministers: President of the Council of Ministers (ex officio) [3] | |
| 12/25 Oct 1920 - 15/28 Oct 1920 | Eleutherios Kyriakou Benizelos (Ελευθέριος Κυριάκου Βενιζέλος) [4] |
| Antibasileus (Αντιβασιλεύς) | Regent | |
| 15/28 Oct 1920 - 4/17 Nov 1920 | Paulos Theodōrou Kountouriōtēs (Παύλος Θεοδώρου Κουντουριώτης) |
| Basilomētōr Antibasilissa (Βασιλομήτωρ Αντιβασίλισσα) | Queen Mother Regent [5] | |
| 4/17 Nov 1920 - 6/19 Dec 1920 | Olga (Όλγα) [6] |
| Basileus tōn Hellēnōn (Βασιλεύς των Ελλήνων) | King of the Hellenes | |
| 4/17 Nov 1920 - 14/27 Sep 1922 | Kōnstantinos I (Κωνσταντίνος Αʹ) |
| 14/27 Sep 1922 - 25 Mar 1924 | Geōrgios II (Γεώργιος Βʹ) [7] |
| Antibasileus (Αντιβασιλεύς) | Regent | |
| 20 Dec 1923 - 14 Apr 1924 | Paulos Theodōrou Kountouriōtēs (Παύλος Θεοδώρου Κουντουριώτης) [8] |
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| [1] | Baptismal name: Christian Vilhelm Ferdinand Adolf Georg |
| [2] | Takes office upon landing at Piraeus, Greece, 18/30 Oct 1863. |
| [3] | In informal and some official use: Prōthypourgos (Πρωθυπουργός ). |
| [4] | In office as President of the Council of Ministers 14/27 Jun 1917 - 4/17 Nov 1920. |
| [5] | Pending the resumption of the throne by Kōnstantinos I, who arrives in Athens 6/19 Dec 1920. |
| [6] | Original name and title (Russian): velikaja knjažna Ol'ga Konstantinovna (великая княжна Ольга Константиновна) |
| [7] | Ceased to exercise the functions of office upon leaving national territory 19 Dec 1923; all references to the King of the Hellenes (Basileus tōn Hellēnōn|Βασιλεύς των Ελλήνων) in legislation and court decisions are removed 15 Mar 1924 in accordance with a resolution of the Council of Ministers; formal deposition of the Glücksburg dynasty is declared by the Constituent Assembly 25 Mar 1924. |
| [8] | Took the oath of office on 20 Dec 1923, acting for the absent Geōrgios II, and continued to hold the office after the deposition of the dynasty on 25 Mar 1924. |
Last update: 29 Nov 2023