The canton of St. Gallen, also canton of St Gall (German: Kanton St. Gallen Sankt Gallen ; dialectally /saŋkˈalːə/, French: canton de Saint-Gall, Italian: Cantone di San Gallo, Romansh: chantun Son Gagl), is a canton of Switzerland. The capital is St. Gallen.
Located in northeastern Switzerland, the canton has an area of 2,026 km2 (782 sq mi) (5% of Switzerland) and a resident population close to half a million as of 2015 (6% of Switzerland). It was formed in 1803 as a conflation of the city of St. Gallen, the territories of the Abbey of St. Gall and various former subject territories of the Old Swiss Confederacy.