Edgeworthstown or Mostrim (Irish: Meathas Troim, meaning "frontier of the elder tree") is a village in County Longford, Ireland. The town is in the east of the county, near the border with County Westmeath. Nearby towns are Longford 12 km to the west, Mullingar 26 km to the east, Athlone 40 km to the south and Cavan 42 km to the north.