Tersilochinae is a worldwide subfamily of the parasitic wasp family Ichneumonidae.

Tersilochinae species are koinobiont endoparasitoids of Coleoptera larvae, (although Symphyta larvae are recorded as hosts of one genus).

Hosts include Curculionidae and Chrysomelidae so Tersilochinae are used for biological control.

There are currently 24 genera and 500 species.

This Ichneumonidae-related article is a stub.