Stigmella myrtillella is a moth of the family Nepticulidae. It is found from Fennoscandia and northern Russia to the Pyrenees, Italy and Bulgaria, and from Ireland to Ukraine.
The wingspan is 5,4-6,3 mm. The head is ferruginous-yellowish, the collar paler. The antennal eyecaps are whitish. The forewings are dark fuscous, faintly purple-tinged with a rather oblique somewhat shining whitish fascia beyond middle. The outer half of cilia ochreous-white. The hindwings are light grey.
Adults are on wing in May and June.
The larvae feed on Vaccinium myrtillus and Vaccinium uliginosum. They mine the leaves of their host plant.