Acacia simsii (or heathlands wattle, Sims’ wattle) is a shrub belonging to the genus Acacia in the family Fabaceae. It is native to New Guinea and northern Australia. In Australia it is found in both the Northern Territory and Queensland.

In the Territory, it is found in the bioregions Arnhem Coast, Cape York Peninsula, Einasleigh Uplands, Gulf Fall and Uplands, Gulf Plains, Northern Kimberley, Pine Creek, Tiwi Cobourg, and Wet Tropics.

in the Territory, it has been found flowering in January, February, April, May, June, July, September, October, and November, and fruiting in those months but also in March, August and December.

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