Dundalk FC was founded in 1903 and has won the League of Ireland Premier Division 13 times.
Drogheda United FC was founded in 1919 and has won the League of Ireland Premier Division once in 2007.
The rivalry between Dundalk and Drogheda United is known as the Louth Derby and is one of the oldest and most fierce rivalries in Irish football.
In their most recent meeting in the 2021 Irish Premier Division, Dundalk defeated Drogheda United 1-0.
Both Dundalk and Drogheda United have represented Ireland in European competitions, with Dundalk reaching the group stages of the Europa League in 2016.
Dundalk's home ground is Oriel Park, while Drogheda United plays their home matches at United Park.