Maglaj is a town and municipality located in the Zenica-Doboj Canton of the Federation of Bosnia and Herzegovina, an entity of Bosnia and Herzegovina. It is located in northern Bosnia and Herzegovina, 25 km (16 mi) south of Doboj. It has a population of 6,438, with 34,980 inhabitants in the municipality.

The Bosna is the third longest river in Bosnia and Herzegovina, and is considered one of the country's three major internal rivers, along with the Neretva and the Vrbas. The other three major rivers of Bosnia and Herzegovina are the Una, to the northwest; the Sava, to the north, and the Drina, to the east. This river is the namesake of Bosnia. The river Bosna flows for 282 kilometers (175 mi).