In the entire world, Masanja (Masanja 
) is a common male first name. The given name Masanja is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is quite a common boy's name, Kenya, where it is a rare male name, and Nigeria, where it is a very rare principally masculine, but very seldom feminine name. More prevalently, Masanja is the last name as well as the forename.