The largest and main campus of Njala University is in Njala, Moyamba District; the other campus is Bo, the second largest city in Sierra Leone.
Subsequent legislation in 1972 paired Fourah Bay and Njala under the University of Sierra Leone act, where the presidents of each institution switched the presidency of the USL on a biennial basis.
This continued until 2005, when the university act separated Fourah Bay and NU into distinct institutions independently run.
The university commenced in August 2005 with the founding of 6 schools: Bo campus has three schools, Education, Community Health Services and Social Sciences.
Njala campus has the other three schools, including Agriculture, Environmental Sciences and Technology as well as the university secretariat.