Douglasiidae is a small Lepidopteran family. It includes around 32 species of micromoth whose adults are collectively called Douglas moths, after British lepidopterist and hemipterist John William Douglas. The largest genus in the family is Tinagma. They are primarily found in the Palearctic realm, with some Nearctic species. The adults have a 6 to 15 mm wingspan, with a reduced hindwing venation and long fringes. The larvae are leaf miners or borers, primarily in stems and petioles, belonging to Boraginaceae, Labiatae, and Rosaceae.

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