Westmeath is the 20th largest of Ireland's 32 counties by area and the 22nd largest in terms of population. It is the sixth largest of Leinster's 12 counties in size and eighth largest in terms of population. The Hill of Uisneach in the barony of Moycashel is sometimes regarded as the notional geographical centre of Ireland although the actual geographic centre of Ireland lies in neighbouring County Roscommon. The summit of Mullaghmeen is the highest point in County Westmeath. At just 258 metres this makes it the lowest county top in Ireland.