(2008) Temne 35% Mende 31% Limba 8% Kono 5% Krio (Creole) 2% Mandingo 2% Loko 2% other 15% Demonym Sierra Leonean Government Unitary presidential Constitutional republic  -  President Ernest Bai Koroma ( APC )  -  Vice President Alhaji Samuel Sam-Sumana ( APC )  -  Speaker of Parliament Abel Nathaniel Bankole Stronge