The Social Liberal Youth of Denmark (Danish: Radikal Ungdom, literally Radical Youth, abbreviated RU), is a social liberal political youth organization in Denmark. Radical indicates a relation to 19th and 20th century radicalism, the historical left-liberalism which is shared with the Danish Social Liberal Party, the mother party.
In its current form, Radikal Ungdom was founded on April 30, 1994 after the original legal entity was dissolved due to participation in the widespread fraud involving funding from the Danish Youth Council. The original entity had its first chapter founded in Copenhagen in 1904, which merged into a larger national organization founded in 1911.
The Social Liberal Youth of Denmark is a member of three international liberal umbrella organizations: The Nordic Liberal and Radical Youth League (NLRU), European Liberal Youth (LYMEC) and the International Federation of Liberal and Radical Youth (IFRLY).
At the latest national congress in October 2011, Ditte Søndergaard was elected chairwoman of the organization, and Sebastian Hvid Jedzini was elected deputy chairman.