Polleniidae is a family of flies in the order Diptera.

[2] The largest genus is Pollenia, with close to 190 species of flies commonly called "cluster flies".

[3][4] The family Polleniidae has been considered a subfamily of Calliphoridae in the past, containing various genera and species.

As a result of phylogenetic analysis, the subfamily Polleniinae was elevated to family rank by Cerretti, et al., in 2019,[5] and assigned the genera listed below.

This article related to members of the muscomorph flies superfamily Oestroidea is a stub.