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This article lists 100 long-lived and still-living current or former heads of state or heads of government of sovereign states (often a president, prime minister, or monarch) whose age can be proven beyond reasonable doubt. Leaders are not included if no reliable secondary sources have confirmed that the leader is alive within the last ten years. Leaders currently in office are in bold italics, with Robert Mugabe being the oldest currently serving head of state and government.
The following individuals might be older than #63–39 or #100–94 on this list, but their exact date of birth is uncertain.
The following individuals are older than #10–100 on this list, but their status as a state leader is unclear. They were either members of collective presidencies, interim leaders or widely recognised leaders whose true power was limited.