The Una-Sana Canton (Serbian and Bosnian: Unsko-sanski kanton / Унско-сански кантон; Croatian: Unsko-sanska županija) is one of the ten cantons of the Federation of Bosnia and Herzegovina entity within Bosnia and Herzegovina. It is located in the northwest of the country and has been named after the rivers Una and Sana. The center of the cantonal government is Bihać. The canton is bordered by Republika Srpska from east, Canton 10 from southeast, and Croatia from south, west, and north.
It is divided into municipalities (usually eponymous with towns) of Bihać, Bosanska Krupa, Bosanski Petrovac, Bužim, Cazin, Ključ, Sanski Most and Velika Kladuša.
In the 1991 census, the canton of Una-Sana had 330,479 residents, including:
241,511 (73.08%) Bosniaks
67,351 (20.38%) Serbs
8,766 (2.653%) Croats
12,851 (3.887%) others
In the 2013 census, the canton of Una-Sana had 273,261 residents, including:
246,012 (90.02%) Bosniaks
8,452 (3.09%) Serbs
5,073 (1.85%) Croats
13,724 (5.04%) others
Due to the proximity to Croatia and that country's narrow northern outline, various important traffic lines between Zagreb and the Adriatic traverse the Una-Sana canton, such as the railway line Bosanski Novi — Bihać — Knin. The largest airport of Željava is located near Bihać and is located right between Bosnian and Croatian border.