灰蝶亚科（Copper，学名：Lycaeninae）是灰蝶科里的一个亚科，线灰蝶亚科的旁系群。物种主要分布于全北界，亦有些分布于热带区。

• 彩灰蝶族 Heliophorini
• 灰蝶族 Lycaenini

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.