Scanty evidence has been the major obstacle for studying historical demography in Sub Saharan Africa. Our most certain knowledge of the 19th century and the beginning of the 20th century populations development is based on a retrospective view of the post Second World War censuses. In north Namibia the availability of continuous series of parish record data since the 1920s offer excellent possibilities to study population development on a regional level by primary sources. In this study fertility, mortality and internal migration in north Namibia among the Christian population since the mid 1920s to the 1990s is analyzed.