King of Hanover

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King of Hanover
Coat of arms
Last to reign George V 18 November 1851 – 20 September 1866
Details
Style	His Majesty
First monarch	George III
Last monarch	George V
Formation	12 October 1814
Abolition	20 September 1866
Appointer	Hereditary
Pretender(s)	Prince Ernst August

The King of Hanover (German: König von Hannover) was the official title of the head of state and hereditary ruler of the Kingdom of Hanover, beginning with the proclamation of King George III of the United Kingdom, as "King of Hanover" during the Congress of Vienna, on 12 October 1814 at Vienna, and ending with the kingdom's annexation by Prussia on 20 September 1866.