Užava (also Dižupe, Zirgmežupe; upstream known as Mazkaiba river, Mālupe; middle stream name Bumbuļupe) is river in Latvia in Kuldīgas, Alsungas and Ventspils counties. It empties into the Baltic Sea.

Užava begins between Gudenieki [lv] and Basu manor [lv] in Gudenieki Parish. It flows along the Piemare and Ventava plains in a north-eastern direction. Most of the flow, except for the section between Tērande and Sise, is regulated and river bed is straightened. As a result of land development and drainage, polder was built along the river. River discharges into the Baltic sea below the village of Užava.

Left bank tributaries

• Saltvalks,
• Bērzkalnupe,
• Tiemene.

Right bank tributaries

• Guļas valks (7 km),
• Stirna (10 km),
• Mārgava (6 km),
• Kauliņas River (26 km),
• Vanka (30 km),
• Gaiļvalks,
• Tērande (15 km).

• Užava lowland