Rhadinosticta simplex is a species of damselfly in the family Isostictidae.

It often flies in shaded areas around vegetation hanging over the stream edge, such as black wattle.

Many males in groups can be found perching high up above water.

Rhadinosticta simplex has been recorded in Australia from near Cooktown in Queensland to Melbourne in Victoria.

[5] Rhadinosticta simplex is found among thick tea-tree beside slow-flowing sections of a river.