Gaziantep Province is a province in south-central Turkey. Its capital is the city of Gaziantep which had a population of 853,513 as of 2000. Its neighbours are Adıyaman at north, Şanlıurfa at east, Syria and Kilis at south, Hatay at southwest, Osmaniye at west and Kahramanmaraş at northwest.
In ancient times, first the Hittites and later the Assyrians controlled the region. It saw much fighting during the Crusades, and Saladin won a key battle there in 1183. After World War I and Ottoman Empire's disintegration, it was invaded by the forces of the French Third Republic during the Turkish War of Independence. It was returned to Turkish control after the Treaty of Lausanne was signed, formally ending hostilities between Turkey and the Allies of World War I.
Originally known as Antep, the title gazi (meaning veteran in Turkish) was added to the province's and the provincial capital's name in 1921, due to its population's actions during the Turkish War of Independence.
Kilis Province was formerly part of Gaziantep Province.