Acacia anastomosa, also known as Carson River wattle,[2] is a species of flowering plant in the family Fabaceae and is endemic to northern Western Australia.

[2][3][4] Acacia anastomosa was first formally described in 2013 by Bruce Maslin, Matthew David Barrett and Russell Lindsay Barrett in the journal Nuytsia from specimens collected near Theda Station Homestead in the north Kimberley region.

[3][5] The specific epithet (anastomosa) means 'formation of a network', referring to the veins in the phyllodes.

[3] This species of wattle is native to a small area in the Kimberley region of Western Australia where it is only known from an area south of Kalumburu where it grows on red volcanic soils in open woodland with Eucalyptus tectifica, Corymbia greeniana and Erythrophleum chlorostachys.

[2][3][6] Acacia anastomosa is listed as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[6] meaning that it is known from only one or a few locations where it is potentially at risk.