The population, in 2017, was 46,097 – though this can increase to up to 300,000 in the summer tourist season. With the suburbs included, the metropolitan area's population is approximately 133,000 (2017).

Schools
Schools include:
• 13 public preschools (écoles maternelles)
• 11 public elementary schools

Now inseparably attached to the mainland, Saint-Malo is the most visited place in Brittany. Sites of interest include:
• The walled city (La Ville Intra-Muros)
• The château of Saint-Malo,

Founded by Gauls in the 1st century BC, the ancient town on the site of Saint-Malo was known as the Roman Reginca or Aletum. By the late 4th century AD, th

Saint-Malo is part of Ille-et-Vilaine's 7th constituency, and is currently represented in the National Assembly by Republicans Member of Parliament, Gilles Lurton.

Saint-Malo has a terminal for ferry services with daily departures to Portsmouth operated by Brittany Ferries and services on most days Poole in England via the

Saint-Malo was the birthplace of:
• Jacques Cartier (1491–1557), explorer of Canada
• Jacques Gouin de Beauchene (1652–1730), explorer of the Falkland Islands