The canton of St. Gallen or St Gall is a canton of Switzerland. Its capital is St. Gallen. Located in northeastern Switzerland, the canton has an area of 2,026 km² and a resident population close to half a million as of 2015. 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 O…The canton of St. Gallen or St Gall is a canton of Switzerland. Its capital is St. Gallen. Located in northeastern Switzerland, the canton has an area of 2,026 km² and a resident population close to half a million as of 2015. 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.