This is the smallest division within a county and in the
case of County Louth sizes vary from the townland of
Longstones in Mullary civil parish at 0.79 acres to the
townland of Collon in Collon civil parish at 4,348.23 acres.
A large part of the townland system in County Louth is
identifiable from the early fourteenth century. This
administrative division remains in use today although it is
being eroded in the towns and cities.