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Region
Worldwide
Survey time period
1900 to 2025
Supplementary notes
Royal leaders are not included. Shows the 50 longest ruling dictators.
Leaders marked in gray are still in office.
*Prime Minister from 1975 to 1982, then President
**Leader on Mainland China from 1931 to 1949, then on Taiwan from 1949 to 1975.
***Chairman of the Supreme Military Council from 1979 to 1982, then President.
****First period from 1979 to 1992, second term since 1997.
Chairman of Supreme Assembly from 1992 to 1994, then President.
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