| 4 Nov 1875 | Kingdom of Tonga | Leaders |
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| 1905 | British protectorate | Leaders |
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| 5 Jun 1970 | independence | Leaders |
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| 17.. - 1770 | Fatafehi Tu'i Pulotu 'i Langi Tu'oteau | Rulers (title Tu'i Tonga) |
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| 1770 - 1784 | Fatafehi Paulaho | Rulers (title Tu'i Tonga) |
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| 1784 - 1786 | Fatafehi Ma'ulupekotofa | Rulers (title Tu'i Tonga) |
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| 1786 - 1793 | vacant | Rulers (title Tu'i Tonga) |
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| 1793 - 1810 | Fatafehi Fununuiava | Rulers (title Tu'i Tonga) |
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| 1810 - 1827 | vacant | Rulers (title Tu'i Tonga) |
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| 1827 - 9 Dec 1865 | Fatafehi Laufilitonga (from 1851, Samuelio Fatafehi Laufilitonga) (b. 1797 - d. 1865) | Rulers (title Tu'i Tonga) |
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| ... - ... | Mapa | Chiefs (title Tu'i Ha'atakalaua) |
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| ... - ... | Fuatakifolaha | Chiefs (title Tu'i Ha'atakalaua) |
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| ... - 1777 | Maealiuaki | Chiefs (title Tu'i Ha'atakalaua) |
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| 1777 - 10 May 1799 | Mulikiha'amea | Chiefs (title Tu'i Ha'atakalaua) |
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| ... - ... | Tupoulahi | Chiefs (title Tu'i Kanokupolu) |
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| ... - 1777 | Maealiuaki | Chiefs (title Tu'i Kanokupolu) |
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| 1777 - 1782 | Tu'i Halafatai | Chiefs (title Tu'i Kanokupolu) |
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| 1782 - 17.. | Tupoulahisi'i | Chiefs (title Tu'i Kanokupolu) |
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| 17.. - 1793 | Mulikiha'amea | Chiefs (title Tu'i Kanokupolu) |
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| 1793 | Tupoumahe'ofo (f) | Chiefs (title Tu'i Kanokupolu) |
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| 1793 - 29 Apr 1797 | Tupou Mumui | Chiefs (title Tu'i Kanokupolu) |
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| 1797 - 21 Apr 1799 | Finau Tuku'aho | Chiefs (title Tu'i Kanokupolu) |
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| 21 Apr 1799 - 22 Apr 1799 | Ma'afu'olimuloa | Chiefs (title Tu'i Kanokupolu) |
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| 22 Apr 1799 - 1812 | Tupou Malohi | Chiefs (title Tu'i Kanokupolu) |
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| 1812 - 1820 | Tupouto'a | Chiefs (title Tu'i Kanokupolu) |
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| 1820 - 1826 | vacant | Chiefs (title Tu'i Kanokupolu) |
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| 1826 - 18 Nov 1845 | 'Alea Motu'a Tupouifaletuipapai | Chiefs (title Tu'i Kanokupolu) |
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| 18 Nov 1845 - 4 Nov 1875 | Siaosi Taufa'ahau Tupou Maeakafa | Chiefs (title Tu'i Kanokupolu) |
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| 4 Nov 1875 - 18 Feb 1893 | George Tupou I | Kings/Queens |
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| 18 Feb 1893 - 5 Apr 1918 | George Tupou II | Kings/Queens |
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| 5 Apr 1918 - 16 Dec 1965 | Salote Tupou III (f) | Kings/Queens |
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| 16 Dec 1965 - 11 Sep 2006 | Taufa'ahau Tupou IV | Kings/Queens |
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| 11 Sep 2006 - | George Tupou V | Kings/Queens |
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| 1876 - 18 Dec 1879 | Tevita Unga | Prime ministers |
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| Apr 1881 - Jul 1890 | Shirley Waldemar Baker | Prime ministers |
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| Jul 1890 - 1893 | Siaosi Tuku'aho | Prime ministers |
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| 1893 - Jan 1905 | Siosateki Tonga | Prime ministers |
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| Jan 1905 - 30 Sep 1912 | Sione Mateialona | Prime ministers |
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| 30 Sep 1912 - 30 Jun 1922 | Tevita Tu'ivakano | Prime ministers |
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| 30 Jun 1922 - Jul 1940 | Uiliame Tupoulahi Tungi | Prime ministers |
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| Jul 1940 - 12 Dec 1949 | Solomone Ula Ata | Prime ministers |
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| 12 Dec 1949 - 16 Dec 1965 | Crown Prince Tupouto'a Tungi | Prime ministers |
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| 16 Dec 1965 - 21 Aug 1991 | Prince Fatafehi Tu'ipelehake | Prime ministers |
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| 21 Aug 1991 - 3 Jan 2000 | Baron Vaea | Prime ministers |
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| 3 Jan 2000 - 11 Feb 2006 | Prince 'Ulukalala Lavaka Ata | Prime ministers |
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| 11 Feb 2006 - | Feleti Sevele | Prime ministers |
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| 1901 - 1909 | Hamilton Hunter | British consuls |
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| 1909 - 1913 | W. Telfer Campbell | British consuls |
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| 1913 - 1917 | Henry Eugene Walter Grant | British consuls |
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| 1917 - 1926 | Islay McOwen | British consuls |
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| 1926 - 1937 | James Scott Neill | British consuls |
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| 1937 - 1943 | Arthur Leopold Armstrong | British consuls |
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| 1943 - 1949 | Charles Walter Trevor Johnson | British consuls |
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| 1949 - 1954 | James Edward Windrum | British consuls |
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| 1954 - 1957 | Charles Robert Harley Nott | British consuls |
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| 1957 - 1959 | Archibald Cameron Reid (1st time) | British consuls |
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| 1959 - 1965 | Edward James Coode | British consuls |
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| 1965 - 1970 | Archibald Cameron Reid (2nd time) | British consuls |
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