The Wee County, as it's dubbed, prospered greatly during the Celtic Tiger era thanks to its proximity to Dublin, leading to a welcome increase in activities, restaurants and nightlife (along with commuter congestion).
In the 5th and 6th centuries, Louth was at the centre of ecclesiastical Ireland, with wealthy religious communities at the monastery at Monasterboice and the Cistercian abbey at Mellifont. The 12th-century Norman invaders were responsible for the development of Dundalk and the two towns on opposite banks of the Boyne that united in 1412 to become what is now Drogheda.
Today Drogheda is Louth's most appealing town, a bustling place steeped in history that makes a good base for visiting nearby Brú na Bóinne. It's a quick trip to the picturesque Cooley Peninsula to enjoy the mountainous landscape and the delightful medieval village of Carlingford.
Louth can easily be covered as a day trip from Dublin, but you'll get more from your visit by spending some time exploring the county.