The Santander Group /ˌsɑːntɑːnˈdɛər/ is a Spanish banking group centered on Banco Santander, S.A. (Spanish: [ˈbaŋko santanˈder]). As its name suggests, the company originated in Santander, Spain.[2] The bank is listed in Madrid, New York, London, Sao Paulo, Milan, Buenos Aires, Mexico City, Warsaw and Lisbon.

The group has expanded since 2000 through a number of acquisitions, with operations across Europe, South America, North America and Asia. Many subsidiaries, such as Abbey National, have been rebranded under the Santander name.

The company is a component of the Euro Stoxx 50 stock market index.[3] In May 2016, Santander was ranked as 37th in the Forbes Global 2000 list of the world's biggest public companies. Santander is Spain’s largest bank.