Tenthredininae is a subfamily of sawflies within the family Tenthredinidae, the largest sawfly family. It consists of 28 genera, including the type genus Tenthredo. It also includes most of the larger and more colourful members of the family.
The subfamily is distributed across the Northern Hemisphere and holarctic.
The subfamily is divided into seven tribes. An eighth tribe, Sioblini, containing Conaspidia and Siobla has been elevated to subfamily status as Sioblinae.