This paper reports on the occurrence of Syrphidae in East Africa (Kenya, Tanzania, Uganda), based on 5,600 specimen records incorporated in the biodiversity database of the National Museums of Kenya. In total, 219 species are reported from the region with 171 in Kenya, 123 in Tanzania and 127 in Uganda. The similarities between the faunal composition of the three countries, as well as the endemicity are discussed. Based on GIS mapping of the database records, distribution patterns and zoogeographical relationships are discussed.