This is a list of the longest-reigning monarchs of all time, detailing the monarchs and lifelong leaders who have reigned the longest in world history, ranked by length of reign.
Twenty-five longest-reigning monarchs of states that were internationally recognized as sovereign for most or all of their reign are below.
Queen Elizabeth II of the UK rose to the #2 spot in June 2022, surpassing King Rama IX of Thailand, with a current reign of 70 years and 135 days.
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Source: Time, BBC, Guinness World Records, Wikipedia