Tomares romanovi, Romanoff's hairstreak, is a butterfly of the family Lycaenidae. It is found on the Armenia, Azerbaijan, Georgia, Eastern Turkey, Northern Iran, and Kopet Dagh mountains. The wingspan is 28–30 mm. The species inhabits calcareous grasslands and arid mountain steppes, usually dominated by tragacanth locoweeds. It occupies elevation range from 1200 to 1600 m a.s.l. The butterfly flies from late April to mid June depending on latitude and elevation. The larvae feed on Astragalus scharuhdensis and Astragalus finitimus.