Borgen (Danish pronunciation: [ˈpɒˀwn̩]) is a Danish political drama television series. Adam Price is the co-writer and developer of the series, together with Jeppe Gjervig Gram and Tobias Lindholm. Borgen is produced by SAM Productions on behalf of DR, the Danish public broadcaster, which previously produced The Killing. In Denmark, "Borgen" (lit. 'The Castle') is the informal name of Christiansborg Palace where all three branches of Danish government reside: the Parliament, the Prime Minister's Office, and the Supreme Court, and is often used as a stand in term for the Danish Parliament (Folketinget).

The programme tells how, against all the odds, Birgitte Nyborg Christensen (Sidse Babett Knudsen)—a minor centrist politician—becomes the first female prime minister of Denmark. Other main characters are Birgitte Hjort Sørensen as Katrine Fønsmark, a TV1 news anchor; Pilou Asbæk as Kasper Juul, a spin doctor; Søren Malling as Torben Friis, news editor for TV1; Mikael Birkkjær as Birgitte's husband, Phillip; and Benedikte Hansen as Hanne Holm, a journalist.

Four seasons, each comprising 8–10 episodes, have been made. The first season was broadcast in Denmark in the autumn of 2010, the second in the autumn of 2011, and the third beginning 1 January 2013. In the UK, BBC Four started broadcasting the first season on 7 January 2012, with a repeat-showing starting on 13 June 2012. The second season started on 5 January 2013, with initial overnight viewing figures of over one million for the first episode. The third season began on 16 November 2013, with two episodes being shown back-to-back. The fourth season was announced on 29 April 2020 as a partnership between Netflix and DR, and began airing on 13 February 2022. The fourth season was released as a separate series titled Borgen – Riget, Magten, og Æren (known internationally as Borgen – Power & Glory) on Netflix on 2 June 2022.

The series has been broadcast in most European countries, as well as in the United States, Canada, Mexico, South Korea, Japan, Israel, India, Australia, and New Zealand. The first three seasons were added to Netflix globally on 1 September 2020.