Sepeko is an administrative ward in the Monduli district of the Arusha Region of Tanzania. According to the 2002 census, the ward has a total population of 21,774. At the time of the 2012 census, the ward had a total population of 16,720 
- "2002 Population and Housing Census General Report". Government of Tanzania. Archived from the original on 2005-02-18. Retrieved 2008-08-19.
- 2012 Population Distribution by Administrative Areas and March, National Bureau of Statistics Ministry of Finance Dar es Salaam, March, 2013 , Arusha - Monduli DC
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