The Canal de la Somme (French pronunciation: [kanal də la sɔm]) is a canal in northern France.

Its total length is 156.4 km with 25 locks, from the English Channel at Saint-Valéry-sur-Somme to the Canal de Saint-Quentin at Saint-Simon.

The 54 km section from St. Simon to Bray was completed by 1772, but the rest was not finished until 1843.

[1] The canal as originally built has seen substantial modifications since construction of the Canal du Nord in 1904–1965, and is now made up of four distinct sections: Some authors distinguish the Grande Somme downstream from Péronne and the Petite Somme upstream from Voyennes.

Since 2005 the latter section has been closed to navigation as a result of silt deposits.