Question: who was the longest ruling non-royal head of state post-1900
Answer: Rank Image Name Country Title Term began Term ended Term length Fidel Castro Cuba First Secretary Prime Minister President 000000001959 - 02 - 16 - 0000 16 February 1959 000000002011 - 04 - 19 - 0000 19 April 2011 7004190550000000000 ♠ 52 years , 62 days Kim Il - sung North Korea Chairman of the North Korea Bureau of the Communist Party of Korea Chairman of the Provisional People 's Committee General Secretary Premier President Generalissimo 000000001945 - 12 - 17 - 0000 17 December 1945 000000001994 - 07 - 08 - 0000 8 July 1994 7004177350000000000 ♠ 48 years , 203 days Chiang Kai -