The Liberal League (Luxembourgish: Liberal Liga, French: Ligue Libérale, German: Liberale Liga) was a political party in Luxembourg between 1904 and 1925. It was the indirect predecessor of the Democratic Party (DP), which has been one of the three major parties in Luxembourg since the Second World War.
For the first decade of its existence, the Liberal League maintained the liberal dominance under Prime Minister Paul Eyschen. In 1908, they formed an alliance with the Socialists, leading to confrontations with the Party of the Right over secularism. During the First World War, the party lost much of its advantage, and was replaced as the dominant party by the Party of the Right. In the early 1920s, riven by rivalries between its classical liberal and progressive wings, the party collapsed.