Ehrhartoideae) is a subfamily of the true grass family Poaceae.

It has around 120 species in 19 genera, notably including the major cereal crop rice.

[1] Within the grasses, this subfamily is one of three belonging to the species-rich BOP clade, which all use C3 photosynthesis; it is the basal lineage of the clade.

[2][3] It contains four tribes and one genus of unclear position (incertae sedis): Suddia (thought likely to be in the tribe Phyllorachideae).

[1] Phylogenetic analyses have resolved the branching order of these clades within the subfamily:[1] Bambusoideae (Bamboos) Pooideae Streptogyneae Ehrharteae Phyllorachideae Oryzeae