Adenanthos ellipticus, commonly known as the oval-leaf adenanthos, is a flowering plant from the family Proteaceae that is endemic to Western Australia where it is considered to be Declared Rare Flora.

[4] Adenanthos ellipticus is found only in Fitzgerald River National Park, where it occurs in three populations occupying an area of less than 0.31 square kilometres (77 acres).

[3] Adenanthos ellipticus is killed by bushfire and regenerates from seed afterwards.

[3] The Commonwealth and Western Australian Governments have classified Adenanthos ellipticus as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 in 2008 and Wildlife Conservation Act 1950 (Western Australia) in November 2012 respectively.

[5] Adenanthos ellipticus is unknown in cultivation, and has little horticultural potential, especially compared with the smaller, more compact A. cuneatus.