Tuzla is a city and municipality in Bosnia and Herzegovina. At the time of the 1991 census, it had 131,000 inhabitants. Taking the influx of refugees into account, the city is currently estimated to have 160,000 inhabitants. After Sarajevo,Zenica, Banja Luka, Tuzla is the fourth largest city in Bosnia and Herzegovina, and the seat of the Tuzla Canton and Tuzla Municipality. The name "Tuzla" is derived from the Turkish word for salt, and refers to the extensive salt deposits found underneath the city.