Benken is a municipality in the Wahlkreis of See-Gaster in the canton of St. Gallen in Switzerland. Benken is first mentioned in 741 as Babinchova. Benken has an area, as of 2006, of 16.4 km². Of this area, 72.8% is used for agricultural purposes, while 12.6% is forested. Of the rest of the land, 9.1% is settled and the remainder is non-productive.