Radisson Hotels is an international hotel company with more than 420 locations in 73 countries. The first Radisson Hotel was built in Minneapolis, Minnesota in 1909, and was named after the 17th-century French explorer Pierre-Esprit Radisson. The hotel was purchased by Curt Carlson (1914–1999) in 1962, and is still owned by Carlson.

Radisson Blu, is the brand name for Radisson hotels outside the United States, including those in Europe, Africa, and Asia. These are operated by Belgian hotel firm Rezidor Hotel Group under a master franchise contract with Carlson. Scandinavian Airlines System (SAS) was previously a major shareholder in Rezidor Hotel Group and licensed its brand for Radisson SAS hotels. Following the withdrawal of SAS from the partnership, the name has been replaced by Radisson Blu, although the new brand is being introduced gradually across the portfolio. The SAS Group, former owner of Rezidor, announced the withdrawal of SAS on February 4, 2009. Radisson Blu operates 158 hotels, with 42 projects in development.