Lycaeninae, the coppers, are a subfamily of the gossamer-winged butterflies (Lycaenidae).
The relationships of the Lycaenidae are not fully resolved. Sometimes the Polyommatinae and Theclinae are included in the Lycaeninae; in particular the Theclinae tribe Eumaeini contains many similar taxa. Consequently, the delimitation of the Lycaeninae is by no means definitely resolved; many genera await conformation of placement. Regardless, it is today generally considered better to restrict the Lycaeninae to the immediate relatives of the type genus Lycaena, and one or two clades close to that group.