Wilhelmus Hubertus "Willem" Vliegen (20 November 1862 – 29 July 1947) was a Dutch journalist and politician of the Social Democratic Workers' Party who served as a member of the House of Representatives from 1909 until 1915, and again from 1922 until 1937.

He started working at Excelsior, the SDB's publishing office, in The Hague in 1887, and became a member of the executive board of the party's local branch.

He briefly lived in Paris, where he was inspired by the constructive politics of Jean Jaurès, and in 1902 he became editor of Het Volk.

[1] Starting in 1906, Vlieger served in a number of political offices at the local, provincial and national level.

He served as alderman of Amsterdam twice; he was responsible for finance and municipal companies between 1914 until 1919, and for education, the civil registry and art between 1921 and 1923.