Sergeyevka, Amur OblastSergeyevka is a rural locality and the administrative center of Sergeyevsky Selsoviet of Blagoveshchensky District, Amur Oblast, Russia. The population was 420 as of 2018. There are 8 streets.GeographySergeyevka is located on the left bank of the Amur River, 68 km north of Blagoveshchensk by road. Bibikovo is the nearest rural locality.