Tilioideae is a flowering plant subfamily in the family Malvaceae, though it was formerly considered a large group, placed at family rank and called Tiliaceae.
Within the framework of the Angiosperm Phylogeny Groups III & IV systems, an extended family Malvaceae is recognized by uniting the core Malvales of the Cronquist system - Bombacaceae, Malvaceae sensu stricto, Sterculiaceae and Tiliaceae. Within the APG classification, Malvaceae contains a clade of 3 living genera placed as the subfamily Tilioideae.
The subfamily includes Tilia, Craigia, and Mortoniodendron. The majority of other genera historically included in the family rank "Tiliaceae" have been moved into two other subfamilies of Malvaceae, the Brownlowioideae and Grewioideae.