List of rivers flowing in the province of East Nusa Tenggara (Indonesian: Nusa Tenggara Timur), Indonesia. The province comprises the eastern part of the Lesser Sunda Islands. The main islands in the province are, from west to east: Flores, Sumba, Timor, Alor Archipelago, Barat Daya Islands, and Tanimbar Islands.
<onlyinclude></onlyinclude>
This list is arranged by island in alphabetical order. The respective tributaries indented under each larger stream's name.