F91 Dudelange is a Luxembourgish professional football club based in Dudelange. It currently plays in the Luxembourg National Division. It was formed in 1991 as a merger between three teams in the city: Alliance Dudelange, Stade Dudelange and US Dudelange. Domestically, it has won the Luxembourg National Division on 12 occasions and the Luxembourg Cup seven times. F91 Dudelange qualified for the 2018–19 UEFA Europa League, becoming the first club from the country to reach the group stage of a European competition.