Alexeyevka () is a rural locality (a selo), one of three settlements, in addition to Sanyyakhtakh, Malykhan and Markha, in Sanyyakhtakhsky Rural Okrug of Olyokminsky District in the Sakha Republic, Russia. It is located from Olyokminsk, the administrative center of the district and from Sanyyakhtakh. Its population as of the 2002 Census was 15.