a county of NE Republic of Ireland, in Leinster province on the Irish Sea: the smallest of the counties. County town: Dundalk. Pop: 101 821 (2002). Area: 821 sq km (317 sq miles)
Louth in American English
(laʊθ)
county in Leinster province, E Ireland: 317 sq mi (821 sq km); pop. 91,000