The earliest documented presence of Islam in the territory now known as Liberia dates to the trans-Saharan and West African trade networks that flourished from the 12th century onward. Muslim merchants, scholars, and clerics — primarily from the Mandingo (Mandinka) people of the Mali and Songhai empires — traveled south along established trade corridors, bringing with them the faith, Arabic literacy, and Islamic legal and educational traditions.
By the 16th and 17th centuries, Mandingo communities had established semi-permanent settlements in the forested hinterland regions. These early Muslims introduced Quranic schooling (madrasa), prayer practices, and commercial ethics rooted in Islamic principles to communities that had previously followed indigenous spiritual traditions.
The Vai people of the northwest coast also developed significant contact with Islam during this era. Notably, the Vai script — one of the few independently invented writing systems in recorded history — emerged in the early 19th century in a community already accustomed to Arabic literacy through Islamic instruction. This underscores the deep intellectual influence Islam exercised long before the formal founding of Liberia.