The Posavina Canton (Croatian: Županija Posavska; Bosnian and Serbian: Posavski kanton / Посавски кантон) is one of ten cantons of the Federation of Bosnia and Herzegovina in Bosnia and Herzegovina. It is the smallest canton with an area of only 330.85 km2 (128 sq mi). The canton is an exclave of Federation of Bosnia and Herzegovina, being bordered by Republika Srpska and Brčko District to the south and the river Sava and Croatia to the north. Its capital is Orašje and the largest town is Odžak.