Fort Seybert was an 18th-century frontier fort in the Allegheny Mountains in what is now Pendleton County, West Virginia, United States. In a 1758 surprise raid occasioned by the French and Indian War (1754–63), most of the 30 white settlers sheltering there were massacred by Shawnee and Delaware warriors and the fort was burned. A similar number of settlers at nearby Fort Upper Tract had met the same fate on the previous day. Fort Seybert, of which almost no trace remains today, was situated about 8 miles northeast of the present town of Franklin.