Thocnia or Thoknia (), or Thocneia or Thokneia (Θώκνεια), was a town of ancient Arcadia in the district Parrhasia, situated upon a height on the river Aminius, which flows into the Helisson (the present Elissonas), a tributary of the Alpheius.
Thocnia or Thoknia (Θώκνεια) was an ancient town in Arcadia's Parrhasia region situated on a hill near the Aminius River. This river eventually merges with the Elissonas, which is part of the Alpheius watershed.