One hundred and fourteen species belonging to 29 genera of Araceae are recorded from Sabah: Aglaonema Schott, Alocasia (Schott) G.Don, Amorphophallus Blume ex Decne., Amydrium Schott, Anadendrum Schott, Arisaema Mart., Bucephalandra Schott, Colobogynium Schott, Colocasia Schott, Cryptocoryne Fisch. ex Wydler, Cyrtosperma Griff., Epipremnum Schott, Gamogyne N.E.Br., Homalomena Schott, Lasia Lour., Lemna L., Nabalu S.Y.Wong & P.C.Boyce, Ooia S.Y.Wong & P.C.Boyce, Phymatarum M.Hotta, Pistia L., Pothos L., Rhaphidophora Hassk., Pursegloveia S.Y.Wong, S.L.Low & P.C.Boyce, Rhynchopyle Engl., Schismatoglottis Zoll. & Moritzi, Scindapsus Schott, Spirodela Schleid., Tawaia S.Y.Wong, S.L.Low & P.C.Boyce, Typhonium Schott, and Wolffia Horkel ex Schleid. Two genera, Cryptocoryne and Phymatarum, are newly recorded from Sabah. One species, Pothos leptostachyus Schott, is newly recorded from Sabah. One genus, Tawaia, and 50 species are endemic to Sabah. Taxonomic notes, an identification key to genera, and comments on habitat and ecology of the species are presented.