The species of the genus Euophrys (s. lat.) in Siberia and the Russian Far East are described and differentiated. Color differences have proven to be reliable in distinguishing species in the E.frontalis group which have very similar genitalia. Currently 11 species of the genus are recorded: in the E. erratica group E. erratica (Walckenaer), E. iwatensis Bohdanowicz and Proszynski, and E. obsoleta (Simon); in the E. frontalis group E. flavoater (Grube), E. frontalis (Walckenaer), E. proszynskii sp. n., E. uralensis sp. n., and E. sp.; in the E. petrensis group E. aequipes (O. P.-Cambridge), E. petrensis C. L. Koch, and E. thorelli Kulczynski.