Ennominae is the largest subfamily of the geometer moth family (Geometridae), with some 9,700 described species in 1,100 genera. Most species are fairly small, though some (such as the peppered moth) grow to be considerably large. This subfamily has a global distribution. It includes some species that are notorious defoliating pests. The subfamily was first described by Philogène Auguste Joseph Duponchel in 1845.

The status of several tribes is debated. For example, the Boarmiini are sometimes massively expanded to include the Bistonini, Bupalini, Erannini, Gnophini, Melanolophini, Phaseliini and Theriini. The Nacophorini and perhaps the Campaeini might need to be merged with the Lithinini, and all three might warrant merging into the Ennomini. The group sometimes separated as Cassymini is tentatively included in the Abraxini here. The Alsophilinae, usually treated as a small subfamily in their own right, might simply be a specialized lineage of Boarmiini.

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