Simonsville was originally called Mill Point for the grist mill first built there by James Leithead. The name was changed to Simonsville in December 1865, named after Orrawell Simons who would build another mill there in 1866. Simonsville was abandoned in 1870 like most of the Mormon farms and settlements in the Moapa Valley, due to a tax dispute with the Nevada state government, and it was never reoccupied.