List of monarchs of Tonga

This is a list of monarchs of Tonga since 1845, after the Constitution of Tonga established the role of the monarch. The first constitutional monarch of Tonga was George Tupou I.

2008 cession of powers
Three days before his coronation on 1 August 2008, then-King George Tupou V announced that he would relinquish most of his powers and be guided by the Prime Minister of Tonga's recommendations on most matters.

Budget allocation to monarchy
Annual budget allocation to monarchy is T$ 4,894,900 (c. US$2,116,799).

Lists of earlier monarchs of Tonga

 * Tuʻi Tonga, rulers of Tonga from c. 950 to c.  1470.
 * Tuʻi Haʻatakalaua, rulers of Tonga from c. 1470 to c.  1800.
 * Tuʻi Kanokupolu, rulers of Tonga from c. 1800 to the present day. George Tupou I, the first constitutional monarch of Tonga, was the 19th Tuʻi Kanokupolu.