Louth is in northeastern Ireland, on Dundalk Bay, an inlet of the Irish Sea, is smallest of the Irish counties. Dundalk, the county town, and Drogheda are the chief seaports.

Dundalk is the county town. Louth is situated on an extensive plain. Except for a hilly region in the northeast, the land is low and fertile.

The land is mainly used for cattle and sheep raising, but there is some cultivation of vegetables and oats.

Industry is limited to the towns and includes the manufacture of textiles, beer, and food products. Tourism is also very important to Louth