Radisson Hotels is a major 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 his Carlson Companies.

The majority of Radisson-branded hotels are located in the United States. The company's headquarters, as well as the headquarters of the parent organization, Carlson Companies, are located in the suburbs of Minneapolis, Minnesota, the city where the first Radisson Hotel was built. The original Radisson Hotel, founded by heiress Edna Dickerson, was opened on December 15, 1909 at 41 South Seventh Street in Minneapolis.

There are 420 locations in 73 countries.

Radisson Blu, formerly Radisson SAS, 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 Following the withdrawal of SAS from the partnership, the name has been replaced by Radisson Blu, although the new brand is being introduced gradually across the portfolio.