Coordinates: 48°38′53″N 2°00′27″W / 48.6481°N 2.0075°W / 48.6481; -2.0075
Saint-Malo (French pronunciation: [sɛ̃.ma.lo]; Gallo : Saent-Malô; Breton: Sant-Maloù) is a walled port city in Brittany in northwestern France on the English Channel. It is a sub-prefecture of the Ille-et-Vilaine.
The population can increase to up to 200,000 in the summer tourist season. With the suburbs included, the population is about 153,000 (2011).
The population of the commune more than doubled in 1968 with the merging of three communes: Saint-Malo, Saint-Servan (population 14,963 in 1962), and Paramé (population 8811 in 1962).
Inhabitants of Saint-Malo are called Malouins in French.
Saint-Malo during the Middle Ages was a fortified island at the mouth of the Rance River, controlling not only the estuary but the open sea beyond. The promontory fort of Aleth, south of the modern centre in what is now the Saint-Servan district, commanded approaches to the Rance even before the Romans, but modern Saint-Malo traces its origins to a monastic settlement founded by Saint Aaron and Saint Brendan early in the 6th century. Its name is derived from a man said to have been a follower of Brendan, Saint Malo or Maclou.