The Satanic Temple organisation arranged the rally outside the Arkansas State Capitol building to protest a Ten Commandments monument already on the grounds.
Although the striking, eight-and-a-half foot tall icon was only allowed to be on display temporarily, Satanists argued they should be allowed to erect the winged goat effigy on a permanent basis under freedom of religion rights outlined in the US constitution.
Satanic Arkansas cofounder Ivy Forrester, one of the rally organisers, said: "If you’re going to have one religious monument up then it should be open to others, and if you don’t agree with that then let’s just not have any at all."