<Table> <Tr> <Th> Rank </Th> <Th> Image </Th> <Th> Name </Th> <Th> Country </Th> <Th> Office </Th> <Th> Tenure began </Th> <Th> Length of tenure </Th> </Tr> <Tr> <Td> 1 . </Td> <Td> </Td> <Td> Paul Biya </Td> <Td> Cameroon </Td> <Td> Prime Minister , then President </Td> <Td> 30 June 1975 </Td> <Td> 7004154640000000000 ♠ 42 years , 123 days </Td> </Tr> <Tr> <Td> 2 . </Td> <Td> </Td> <Td> Teodoro Obiang Nguema Mbasogo </Td> <Td> Equatorial Guinea </Td> <Td> President </Td> <Td> 3 August 1979 </Td> <Td> 7004139690000000000 ♠ 38 years , 89 days </Td> </Tr> <Tr> <Td> 3 . </Td> <Td> </Td> <Td> Robert Mugabe </Td> <Td> Zimbabwe </Td> <Td> Prime Minister , then President </Td> <Td> 18 April 1980 </Td> <Td> 7004137100000000000 ♠ 37 years , 196 days </Td> </Tr> <Tr> <Td> 4 . </Td> <Td> </Td> <Td> Ali Khamenei </Td> <Td> Iran </Td> <Td> President , then Supreme Leader </Td> <Td> 13 October 1981 </Td> <Td> 7004131670000000000 ♠ 36 years , 18 days </Td> </Tr> <Tr> <Td> 5 . </Td> <Td> </Td> <Td> Nursultan Nazarbayev </Td> <Td> Kazakhstan </Td> <Td> Prime Minister , then First Secretary , then President </Td> <Td> 22 March 1984 </Td> <Td> 7004122760000000000 ♠ 33 years , 223 days </Td> </Tr> <Tr> <Td> 6 . </Td> <Td> </Td> <Td> Denis Sassou Nguesso </Td> <Td> Republic of the Congo </Td> <Td> President </Td> <Td> 8 February 1979 -- 31 August 1992 ( 1st time ) 25 October 1997 -- present ( 2nd time ) </Td> <Td> 7004122640000000000 ♠ 33 years , 211 days </Td> </Tr> <Tr> <Td> 7 . </Td> <Td> </Td> <Td> Hun Sen </Td> <Td> Cambodia </Td> <Td> Prime Minister </Td> <Td> 14 January 1985 </Td> <Td> 7004119780000000000 ♠ 32 years , 290 days </Td> </Tr> <Tr> <Td> 8 . </Td> <Td> </Td> <Td> Yoweri Museveni </Td> <Td> Uganda </Td> <Td> President </Td> <Td> 26 January 1986 </Td> <Td> 7004116010000000000 ♠ 31 years , 278 days </Td> </Tr> <Tr> <Td> 9 . </Td> <Td> </Td> <Td> Omar al - Bashir </Td> <Td> Sudan </Td> <Td> President </Td> <Td> 30 June 1989 </Td> <Td> 7004103500000000000 ♠ 28 years , 123 days </Td> </Tr> <Tr> <Td> 10 . </Td> <Td> </Td> <Td> Idriss Déby </Td> <Td> Chad </Td> <Td> President </Td> <Td> 2 December 1990 </Td> <Td> 7003983000000000000 ♠ 26 years , 333 days </Td> </Tr> <Tr> <Td> 11 . </Td> <Td> </Td> <Td> Isaias Afwerki </Td> <Td> Eritrea </Td> <Td> President </Td> <Td> 27 April 1991 </Td> <Td> 7003968400000000000 ♠ 26 years , 187 days </Td> </Tr> <Tr> <Td> 12 . </Td> <Td> </Td> <Td> Emomali Rahmon </Td> <Td> Tajikistan </Td> <Td> Acting Head of State , then President </Td> <Td> 19 November 1992 </Td> <Td> 7003911200000000000 ♠ 24 years , 346 days </Td> </Tr> <Tr> <Td> 13 . </Td> <Td> </Td> <Td> Paul Kagame </Td> <Td> Rwanda </Td> <Td> Vice-President , then President </Td> <Td> 19 July 1994 </Td> <Td> 7003850500000000000 ♠ 23 years , 104 days </Td> </Tr> <Tr> <Td> 14 . </Td> <Td> </Td> <Td> Alexander Lukashenko </Td> <Td> Belarus </Td> <Td> President </Td> <Td> 20 July 1994 </Td> <Td> 7003850400000000000 ♠ 23 years , 103 days </Td> </Tr> <Tr> <Td> 15 . </Td> <Td> </Td> <Td> Artur Rasizade </Td> <Td> Azerbaijan </Td> <Td> Prime Minister </Td> <Td> 20 July 1996 -- 4 August 2003 ( 1st time ) 6 August 2003 -- present ( 2nd time ) </Td> <Td> 7003777100000000000 ♠ 21 years , 101 days </Td> </Tr> <Tr> <Td> 16 . </Td> <Td> </Td> <Td> Daniel Ortega </Td> <Td> Nicaragua </Td> <Td> Acting Head of State , then President </Td> <Td> 4 March 1981 -- 25 April 1990 ( 1st time ) 10 January 2007 -- present ( 2nd time ) </Td> <Td> 7003728600000000000 ♠ 19 years , 346 days </Td> </Tr> <Tr> <Td> 17 . </Td> <Td> </Td> <Td> Kim Yong - nam </Td> <Td> North Korea </Td> <Td> President of the Presidium of the Supreme People 's Assembly </Td> <Td> 5 September 1998 </Td> <Td> 7003699600000000000 ♠ 19 years , 56 days </Td> </Tr> <Tr> <Td> 18 . </Td> <Td> </Td> <Td> Tuilaepa Aiono Sailele Malielegaoi </Td> <Td> Samoa </Td> <Td> Prime Minister </Td> <Td> 23 November 1998 </Td> <Td> 7003691700000000000 ♠ 18 years , 342 days </Td> </Tr> <Tr> <Td> 19 . </Td> <Td> </Td> <Td> Abdelaziz Bouteflika </Td> <Td> Algeria </Td> <Td> President </Td> <Td> 27 April 1999 </Td> <Td> 7003676200000000000 ♠ 18 years , 187 days </Td> </Tr> <Tr> <Td> 20 . </Td> <Td> </Td> <Td> Ismaïl Omar Guelleh </Td> <Td> Djibouti </Td> <Td> President </Td> <Td> 8 May 1999 </Td> <Td> 7003675100000000000 ♠ 18 years , 176 days </Td> </Tr> <Tr> <Td> 21 . </Td> <Td> </Td> <Td> Vladimir Putin </Td> <Td> Russia </Td> <Td> Prime Minister , then President
<Table> <Tr> <Th> Rank </Th> <Th> Image </Th> <Th> Name </Th> <Th> Country </Th> <Th> Office </Th> <Th> Tenure began </Th> <Th> Length of tenure </Th> </Tr> <Tr> <Td> 1 . </Td> <Td> </Td> <Td> Paul Biya </Td> <Td> Cameroon </Td> <Td> Prime Minister , then President </Td> <Td> 30 June 1975 </Td> <Td> 7004154640000000000 ♠ 42 years , 123 days </Td> </Tr> <Tr> <Td> 2 . </Td> <Td> </Td> <Td> Teodoro Obiang Nguema Mbasogo </Td> <Td> Equatorial Guinea </Td> <Td> President </Td> <Td> 3 August 1979 </Td> <Td> 7004139690000000000 ♠ 38 years , 89 days </Td> </Tr> <Tr> <Td> 3 . </Td> <Td> </Td> <Td> Robert Mugabe </Td> <Td> Zimbabwe </Td> <Td> Prime Minister , then President </Td> <Td> 18 April 1980 </Td> <Td> 7004137100000000000 ♠ 37 years , 196 days </Td> </Tr> <Tr> <Td> 4 . </Td> <Td> </Td> <Td> Ali Khamenei </Td> <Td> Iran </Td> <Td> President , then Supreme Leader </Td> <Td> 13 October 1981 </Td> <Td> 7004131670000000000 ♠ 36 years , 18 days </Td> </Tr> <Tr> <Td> 5 . </Td> <Td> </Td> <Td> Nursultan Nazarbayev </Td> <Td> Kazakhstan </Td> <Td> Prime Minister , then First Secretary , then President </Td> <Td> 22 March 1984 </Td> <Td> 7004122760000000000 ♠ 33 years , 223 days </Td> </Tr> <Tr> <Td> 6 . </Td> <Td> </Td> <Td> Denis Sassou Nguesso </Td> <Td> Republic of the Congo </Td> <Td> President </Td> <Td> 8 February 1979 -- 31 August 1992 ( 1st time ) 25 October 1997 -- present ( 2nd time ) </Td> <Td> 7004122640000000000 ♠ 33 years , 211 days </Td> </Tr> <Tr> <Td> 7 . </Td> <Td> </Td> <Td> Hun Sen </Td> <Td> Cambodia </Td> <Td> Prime Minister </Td> <Td> 14 January 1985 </Td> <Td> 7004119780000000000 ♠ 32 years , 290 days </Td> </Tr> <Tr> <Td> 8 . </Td> <Td> </Td> <Td> Yoweri Museveni </Td> <Td> Uganda </Td> <Td> President </Td> <Td> 26 January 1986 </Td> <Td> 7004116010000000000 ♠ 31 years , 278 days </Td> </Tr> <Tr> <Td> 9 . </Td> <Td> </Td> <Td> Omar al - Bashir </Td> <Td> Sudan </Td> <Td> President </Td> <Td> 30 June 1989 </Td> <Td> 7004103500000000000 ♠ 28 years , 123 days </Td> </Tr> <Tr> <Td> 10 . </Td> <Td> </Td> <Td> Idriss Déby </Td> <Td> Chad </Td> <Td> President </Td> <Td> 2 December 1990 </Td> <Td> 7003983000000000000 ♠ 26 years , 333 days </Td> </Tr> <Tr> <Td> 11 . </Td> <Td> </Td> <Td> Isaias Afwerki </Td> <Td> Eritrea </Td> <Td> President </Td> <Td> 27 April 1991 </Td> <Td> 7003968400000000000 ♠ 26 years , 187 days </Td> </Tr> <Tr> <Td> 12 . </Td> <Td> </Td> <Td> Emomali Rahmon </Td> <Td> Tajikistan </Td> <Td> Acting Head of State , then President </Td> <Td> 19 November 1992 </Td> <Td> 7003911200000000000 ♠ 24 years , 346 days </Td> </Tr> <Tr> <Td> 13 . </Td> <Td> </Td> <Td> Paul Kagame </Td> <Td> Rwanda </Td> <Td> Vice-President , then President </Td> <Td> 19 July 1994 </Td> <Td> 7003850500000000000 ♠ 23 years , 104 days </Td> </Tr> <Tr> <Td> 14 . </Td> <Td> </Td> <Td> Alexander Lukashenko </Td> <Td> Belarus </Td> <Td> President </Td> <Td> 20 July 1994 </Td> <Td> 7003850400000000000 ♠ 23 years , 103 days </Td> </Tr> <Tr> <Td> 15 . </Td> <Td> </Td> <Td> Artur Rasizade </Td> <Td> Azerbaijan </Td> <Td> Prime Minister </Td> <Td> 20 July 1996 -- 4 August 2003 ( 1st time ) 6 August 2003 -- present ( 2nd time ) </Td> <Td> 7003777100000000000 ♠ 21 years , 101 days </Td> </Tr> <Tr> <Td> 16 . </Td> <Td> </Td> <Td> Daniel Ortega </Td> <Td> Nicaragua </Td> <Td> Acting Head of State , then President </Td> <Td> 4 March 1981 -- 25 April 1990 ( 1st time ) 10 January 2007 -- present ( 2nd time ) </Td> <Td> 7003728600000000000 ♠ 19 years , 346 days </Td> </Tr> <Tr> <Td> 17 . </Td> <Td> </Td> <Td> Kim Yong - nam </Td> <Td> North Korea </Td> <Td> President of the Presidium of the Supreme People 's Assembly </Td> <Td> 5 September 1998 </Td> <Td> 7003699600000000000 ♠ 19 years , 56 days </Td> </Tr> <Tr> <Td> 18 . </Td> <Td> </Td> <Td> Tuilaepa Aiono Sailele Malielegaoi </Td> <Td> Samoa </Td> <Td> Prime Minister </Td> <Td> 23 November 1998 </Td> <Td> 7003691700000000000 ♠ 18 years , 342 days </Td> </Tr> <Tr> <Td> 19 . </Td> <Td> </Td> <Td> Abdelaziz Bouteflika </Td> <Td> Algeria </Td> <Td> President </Td> <Td> 27 April 1999 </Td> <Td> 7003676200000000000 ♠ 18 years , 187 days </Td> </Tr> <Tr> <Td> 20 . </Td> <Td> </Td> <Td> Ismaïl Omar Guelleh </Td> <Td> Djibouti </Td> <Td> President </Td> <Td> 8 May 1999 </Td> <Td> 7003675100000000000 ♠ 18 years , 176 days </Td> </Tr> <Tr> <Td> 21 . </Td> <Td> </Td> <Td> Vladimir Putin </Td> <Td> Russia </Td> <Td> Prime Minister , then President
who is the longest serving president in the world
who is the longest serving president in the world
Paul Biya
Paul Biya