Knockatallon or Knockatallan (Irish: Cnoc an tSalainn, meaning 'hill of salt') is a hamlet and townland in the north of County Monaghan in Ireland, being located in the parish of Tydavnet. The Roman Catholic parish church is located in the village of Tydavnet itself. Knockatallan is located to the west of Sheskin. The Knockatallan name is also used by locals to refer to a larger area including several other townlands such as Knockacullion and Corlat.