The Haydarpaşa Terminal or Haydarpaşa Station (Turkish: Haydarpaşa Garı) is a major intercity rail station and transportation hub in İstanbul. It is the busiest rail terminal in Turkey and the Middle East and one of the busiest in Eastern Europe. The terminal also has connections to İETT bus and ferry service. The Moda Tramway is a few blocks south of the station. The station has a main building (opened in 1909) that houses the headquarters of District 1.

Haydarpaşa Terminal is the western terminus of the Istanbul-Ankara Main Line and was the western terminus of the former Baghdad Railway (İstanbul-Konya-Adana-Aleppo-Baghdad) and the Hejaz Railway (İstanbul-Konya-Adana-Aleppo-Damascus-Amman-Medina)[2]. The tracks do not cross the Bosphorus, but there is a train ferry, that carries rail cars from Haydarpaşa, on the Asian side, to Sirkeci, on the European side.
İstanbul was a very important city. At the time, it was the capital of the Ottoman Empire as well as the largest city in the empire. İstanbul was a major economic and cultural hub. İstanbul had no rail link, so in 1871 Sultan Abdülaziz ordered a rail line to be built from Haydarpaşa to İzmit. Haydarpaşa station opened in 1872