Many causes of mortality have been reported for the peregrine falcon (Falco peregrinus), but there are no published descriptions of fence mortalities for this species. We report on a recently deceased juvenile peregrine falcon that was found ensnared on the top strand of a barbed-wire fence on 24 August 2018 in Hale County, Texas. The cause of mortality was determined to be from exposure after being ensnared by a barb on the fence, a previously undescribed cause of fence-related mortality for the species. This mortality illustrates the novel hazard that fencing and other such structures pose to wildlife, and highlights problems with using barbed fencing because it increases the risk of mortality due to ensnarement and exposure in addition to the risk of blunt-force trauma from collision.