Fort Phantom Hill was an United States Army and Confederate Army installation located at the Clear Fork of the Brazos River in Taylor County, Texas. The fort was active from 1852 to 1853 and again from 1856 until the 1890s. In 1858, the property was reoccupied as a way station on the Southern Overland Mail route and the Butterfield Stagecoach set up a stop at the abandoned fort. Fort Phantom Hill was used again during the Civil War by the Confederacy's Frontier Battalion, and in 1871 became a subpost of Fort Griffin (near Albany, Texas) and was used by troops engaged in Indian campaigns.