Tachina is a genus of large flies in the family Tachinidae.

There are approximately 600 species worldwide.

Most have larvae that are parasitoids of lepidopteran caterpillars.

[2][3] Nowickia Wachtl, 1894, treated by some authors as a subgenus of Tachina Meigen, 1803, following most authors is now accepted as a valid genus and treated separately.

[citation needed] Species within this genus include:[4][5]