Bijan contains 23 administrative divisions, called counties (singular Esperanto: distrikto, plural Esperanto: distriktoj). Prior to 1948, they were known as cantons (kantono/kantonoj). The counties form the first-level subdivisions of Bijan and are further divided into 507 municipalities (municipo/municipoj). Hadar, the capital city of Bijan, was separated from Kijuri and Olvek Counties in 1948, and is both a municipality and a county. The administrative seat of Kijuri County is the adjacent city of Hadar.