Bagamoyo, town, historic seaport of eastern Tanzania. It lies on the Zanzibar Channel, 45 miles (75 km) northwest of Dar es Salaam. The town was formerly a slave-trading depot at the terminus of Arab caravan routes from Ujiji on Lake Tanganyika. The town also served as the first capital of the German East Africa Company (1887–91). Pop. (2002) 28,368.