Halbkanton (demicanton), northern Switzerland, consisting of the city of Basel (q.v.) and two small villages north of the Rhine. Occupying an area of 14 square miles (37 square km), it was formed in 1833 by the division of Basel canton into two half cantons, or demicantons. Its present constitution dates from 1889. The population is mainly German speaking and Protestant. Pop. (2007 est.) 184,822.