Tolmomyias is a genus of Neotropical birds in the tyrant flycatcher family Tyrannidae.

The genus was erected by the Austrian ornithologist Carl Eduard Hellmayr in 1927 with the yellow-olive flatbill (Tolmomyias sulphurescens) as the type species.

[1] The genus name Tolmomyias combines the Ancient Greek tolma "courage" or "boldness" with the Neo-Latin myias "flycatcher".

They are relatively thickset birds with proportionally large heads and, as suggested by their name, flat bills.

All have a primarily yellow-green plumage with distinct edging to the wings, and the crown is often grey.