Köniz is a statistical town and a municipality in the Bern-Mittelland administrative district right on the southern border to Bern in the cant…Köniz is a statistical town and a municipality in the Bern-Mittelland administrative district right on the southern border to Bern in the canton of Bern in Switzerland. The municipality of Köniz as a single settlement would belong to the 15 most populous towns in Switzerland. It is also part of the larger agglomeration of Bern of about 400,000 inhabitants.