Ust-Vayenga (Russian: Усть-Ваеньга) is a rural locality (a settlement) and the administrative center of Ust-Vayengskoye Rural Settlement of Vinogradovsky District, Arkhangelsk Oblast, Russia.

The population was 964 as of 2010.

Ust-Vayenga is located 22 km north of Bereznik (the district's administrative centre) by road.

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