Diamond Trust Bank Uganda Limited (DTBUL), is a commercial bank headquartered in Uganda. It is licensed and supervised by the Bank of Uganda, the central bank and national banking regulator.

The bank dates to 1945, when it was operating as the Diamond Jubilee Investment Trust (DJIT), with its head office in Dar es Salaam, Tanzania, and branches in Mombasa, Kenya and Kampala, Uganda. Branches were later opened at Nairobi and Kisumu in Kenya. The company was initially established as a community-based finance house, dedicated towards the extension of credit to the East African Ismaili Community and the mobilization of their savings. In 1965, DJIT was split into three entities, one each in Kenya, Tanzania, and Uganda