Koroma's mother, Alice Koroma (27 June 1932 – 6 July 2012), was an ethnic Biriwa Limba from the small rural town of Kamabai, also in Bombali District. She entered local politics in the 1960s, and was elected as a member of the All People's Congress (APC) to the Makeni city council. Alice Koroma was women's leader of the APC Bombali District branch. She was also a strong supporter of President Siaka Stevens' administration, when the APC leader was elected. Alice Koroma later worked for most of her career as a primary school teacher in Makeni.