Mwanza (mwänˈzä) [key], city (1994 est. pop. 260,000), capital of Mwanza prov., NW Tanzania, a port on Lake Victoria. Connected by rail with Dar-es-Salaam, the city handles much of Tanzania's trade with Kenya and Uganda, with which it is connected by boat. Industries include meatpacking, fishing, and the manufacture of textiles and soap. There is an institute for research in tropical diseases.