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.