Who was the last ruler of england?

King George III ruled from 1760 until 1820; he was therefore the last king of Great Britain and, from 1 January 1801, the first king of the United Kingdom of Great Britain and Ireland. The last king of Great Britain was King George VI who reigned from 11 December 1936 to 6 February 1952.

The current monarch is Queen Elizabeth II, who has reigned since George VI.