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| Decades: |  - 1970s
  - 1980s
  - 1990s
  - 2000s
  - 2010s
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| See also: |    | 
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 The following lists events that happened during 1999 in Sierra Leone. 
  Incumbents
  Events
 January
 - January 1 - ECOMOG succeeds in the battle with rebels in Port Loko.[1]
  - January 3 - Reports emerge that refugees have come under attack due to clashes between government and rebel forces in the camps.[2]
  - January 4 - The Nigerian-led ECOMOG began attacking rebels near Freetown.[3]
  - January 6 - Rebels and government forces continue to clash over the capital of Freetown.[4] The United Kingdom encourages their citizens to leave Sierra Leone.[5]
 
 August
 - August 9 - The AFRC rebels release 19 of their hostages.[6]
 
 September
 - September 6 - Nigeria announces plans to withdraw their peacekeepers by next month.[7]
 
 References
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 - Pre-1961
  - 1961
  - 1962
  - 1963
  - 1964
  - 1965
  - 1966
  - 1967
  - 1968
  - 1969
  - 1970
  - 1971
  - 1972
  - 1973
  - 1974
  - 1975
  - 1976
  - 1977
  - 1978
  - 1979
  - 1980
  - 1981
  - 1982
  - 1983
  - 1984
  - 1985
  - 1986
  - 1987
  - 1988
  - 1989
  - 1990
  - 1991
  - 1992
  - 1993
  - 1994
  - 1995
  - 1996
  - 1997
  - 1998
   - 2000
  - 2001
  - 2002
  - 2003
  - 2004
  - 2005
  - 2006
  - 2007
  - 2008
  - 2009
  - 2010
  - 2011
  - 2012
  - 2013
  - 2014
  - 2015
  - 2016
  - 2017
  - 2018
  - 2019
  - 2020
  - 2021
  - 2022
  - 2023
  - 2024
  - 2025
     | 
  1999 in Africa  | 
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| Sovereign states |  | 
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States with limited recognition  |  - Sahrawi Arab Democratic Republic
  - Somaliland
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Dependencies and other territories  |  - Canary Islands / Ceuta / Melilla (Spain)
  - Madeira (Portugal)
  - Mayotte / Réunion (France)
  - Saint Helena / Ascension Island / Tristan da Cunha (United Kingdom)
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