A post office was established at Limestone Gap, Indian Territory on March 29, 1875; it closed on February 28, 1922. From September 22, 1897 to July 15, 1901 the name of the post office was Limestone. The area is now known as Gap.[3]
Gravestones in a cemetery there had deaths dating from 1886 to 1940.[5] Charles LeFlore, a deputy US marshal, who served as captain of the Indian Police, had a ranch there.[6]