he Cosmopterigidae are a family of over 1,800 species of small moths in the superfamily Gelechioidea. They occur worldwide, with highest diversity in the tropics; about 130 species are recorded in North America. The family was established by George Francis Hampson in 1900.

Adults have wingspans of 5–20 mm, narrow wings with metallic or iridescent markings (gold, silver, blue, or purple), and are held roof-like at rest. Most are nocturnal or crepuscular, though some fly by day. Larvae are leaf miners, stem borers, or seed feeders on a wide range of plants, including grasses, orchids, and fruits; a few are gall-makers or predators.

The family includes subfamilies such as Cosmopteriginae (with genera Cosmopterix, Pyroderces, and Limnaecia) and Chrysopeleiinae (with Pancalia and Sorhagenia). Many species remain undescribed, especially in the Neotropics and Southeast Asia. Recent studies focus on DNA barcoding and larval host associations.