Huperzioideae is a subfamily of lycopsids in the family Lycopodiaceae. It has sometimes been recognized as a separate family, Huperziaceae. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognizes three extant genera:
The plants are distinct from those of other members of the Lycopodiaceae in having erect (not creeping) growth; and in their spore-bearing structures being produced in the axils of unmodified leaves, rather than in terminal club-like structures. The subfamily also has a basal chromosome count of n=67, versus counts of n=23, 34 in the Lycopodiaceae.