Santoña is a town in the eastern coast of the autonomous community of Cantabria, on the north coast of Spain. It is situated by the bay of the same name. It is 45 kilometres (28 mi) from the capital Santander. Santoña is divided into two zones, an urban plain, and a mountainous area, with Mount Buciero at its eastern limit, and Brusco and the beach of Berria to the north. The beach of San Martin comprises its south limit and the fishing harbor and marsh area its western limit.

Cantabria is an autonomous community and province in northern Spain with Santander as its capital city. It is called a comunidad histórica, a historic community, in its current Statute of Autonomy. It is bordered on the east by the Basque autonomous community, on the south by Castile and León, on the west by the Principality of Asturias, and on the north by the Cantabrian Sea, which forms part of the Bay of Biscay.