Tuzla (Cyrillic: Тузла) 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.

Tuzla is a small town, a suburb of Istanbul, Turkey on the Asian side of the city beyond Kartal and Pendik. Tuzla is on a headland on the coast of the Marmara Sea, at the eastern limit of the city.