Diplolepis is a genus of approximately fifty species of gall-inducing wasps in the family Diplolepididae.

[2][3][4] Adults are small (3–6 mm, 0.12–0.24 in) with a strongly arched mesosoma giving them a hunched appearance.

[2][5] Depending on the species of wasp, galls may be single-chambered or multi-chambered, and detachable or integral.

[5] The larvae of both the gall-inducing Diplolepis species and the inquilines (if present) are used as hosts by a number of parasitoid wasps, including wasps from the families Eulophidae, Eupelmidae, Eurytomidae, Ormyridae, Pteromalidae, Torymidae, and Ichneumonidae.

[1] This subfamily was previously considered a tribe - Diplolepidini - of the gall wasp family Cynipidae.