Commelina lanceolata is a plant in the family Commelinaceae native to the Northern Territory and Queensland in Australia. It is a scrambling perennial herb first described by the Scottish botanist Robert Brown in 1810, who published his description in his work Prodromus Florae Novae Hollandiae et Insulae Van Diemen.
This species is listed by the Queensland Department of Environment and Science as least concern., it has not been assessed by the International Union for Conservation of Nature (IUCN).