Dartree () is a barony in County Monaghan, Ireland.
Dartree is known in Irish as DartraÃÂ from the ancient kingdom Dartraighe, named after the n-Dartraighi or Dairtre people.
Dartree barony is in the west of County Monaghan. It is bordered to the northeast by Monaghan barony; to the southeast by Cremorne barony (both in County Monaghan); to the west by Clankelly, County Fermanagh; and to the south by Tullygarvey, County Cavan.