Marsberg (German: [ˈmaʁsˌbəʁk] ^ⓘ) is a town in the Hochsauerland district, in North Rhine-Westphalia, Germany.

Although its origins are obscure, Marsberg was a prospering town by the 13th century (it was even minting coins). It was a free city until 1807, when it was incorporated into the Kingdom of Westphalia, until 1813. After two years of independent government, it was added to Prussia in 1815.

It is situated on the river Diemel, approx. 20 km east of Brilon and 30 km south of Paderborn.

Marsberg consists of the following 17 districts:

Marsberg is twinned with:

• Lillers (France)

• Lissy Ishag (born 1979), television presenter
• Hubertus Klenner (born 1959), mayor of Marsberg 2004–2014
• Hermann Köhler (born 1950), athlete and Olympic athlete
• Fabian Lamotte (born 1983), footballer
• Peter Lohmeyer (born 1962), actor
• Hans-Joachim Watzke (born 1959), managing director of Borussia Dortmund

• 
  Old townhall in Obermarsberg
• 
  The Catholic church of Helminghausen, in southwestern Marsberg
• 
  Nikolai church in Obermarsberg
• 
  St.-Johannes monastery

• Media related to Marsberg at Wikimedia Commons
• Official website (in German)