Polypodioideae is a subfamily belonging to the fern family Polypodiaceae, which is a member of the suborder Polypodiineae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I).

[1] Alternatively, the subfamily may be treated as the tribe Polypodieae within a very broadly defined family Polypodiaceae sensu lato.

Mabberley, in 2008, defined this subfamily in a very broad sense, including all of Polypodiaceae except for the Platycerioideae (Platycerium and Pyrrosia) and the grammitid ferns, which he placed in Grammitidaceae.

[3] Christenhusz et al., in 2011, incorporated phylogenetic evidence to recircumscribe the subfamily, combining the grammitids with Mabberley's Polypodieae (recognizing a number of segregate genera).

[1] Loxogrammoideae Drynarioideae Platycerioideae Microsoroideae "non-grammitid" = Polypodioideae "grammitid" ferns = Grammitidoideae The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognizes the following genera:[1]