© Unofficial Royalty 2015
On September 9, 2015, Queen Elizabeth II surpassed her great-great-grandmother Queen Victoria as the longest-reigning British monarch.
Top 10 Longest Reigning British Monarchs
- Queen Elizabeth II, reigned February 6, 1952 – September 8, 2022; 70 years, 214 days
- Queen Victoria, reigned June 20, 1837 – January 22, 1901; 63 years, 216 days
- King George III, reigned October 25, 1760 – January 29, 1820; 59 years, 96 days
- King Henry III, reigned October 18, 1216 – November 16, 1272; 56 years, 29 days
- King Edward III, reigned January 25, 1327 – June 21, 1377; 50 years, 147 days
- Queen Elizabeth I, reigned November 17, 1558 – March 24, 1603; 44 years, 127 days
- King Henry VI, reigned August 31, 1422 – March 4, 1461 and October 31, 1470 – April 11, 1471; 38 years, 347 days
- King Æthelred II, reigned March 18, 978 – December 25, 1013 and February 3, 1014 – April 23, 1016; 37 years, 362 days
- King Henry VIII, reigned April 22, 1509 – January 28, 1547; 37 years, 281 days
- King Henry I, reigned August 3, 1100 – December 1, 1135; 35 years, 120 days
Honorable Mention: Scottish and Welsh Monarchs Who Could Be Included in the List
- James VI, King of Scots, reigned July 24, 1567 – 27 March 27, 1625; 57 years, 246 days (from March 24, 1603, also King James I of England)
- William I, King of Scots (the Lion), reigned December 9, 1165 – December 4, 1214; 48 years, 360 days
- Llywelyn the Great, Prince of Gwynedd, reigned January 1, 1195 – April 11, 1240; 45 years
- David II, King of Scots, reigned June 7, 1329 – February 22, 1371; 41 years, 260 days
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