The Mwera people have had a Traditional Religion that existed through the 19th century. With the arrival of the German colonial rule of Tanzania, the German Christian missionaries introduced Christianity among the Mwera, and gained converts. However, after the World War I, the British colonial rule of Tanzania began, which expelled all German missionaries. The Mwera missions were abandoned, Islamic missionaries filled the gap particularly in the coastal regions, gained Muslim converts and introduced polygyny among the Mwera people. Most contemporary Mwera adhere to Sunni Islam with small minorities practicing Christianity or their traditional religion.
