Elachista subalbidella is a moth of the Elachistidae family. It is found from Fennoscandia and northern Russia to Italy and Greece and from Ireland to Romania. It is also found in North America (British Columbia, Manitoba, Nova Scotia, Ontario, Quebec, Yukon, Ohio, Pennsylvania and South Dakota). The wingspan is 10–13 millimetres (0.39–0.51 in). Adults are on wing in June.