Sulaiman Bek (Arabic: سليمان بيك, Turkish: Süleyman Bey) is a town in the Tooz District of Salah ad Din Governorate, near the border with Diyala Governorate, in northern Iraq, about 100 km from the Iranian border. It has a population of 70,000, mainly from Iraq's Sunni Turkoman ethnic minority. It is the centre of a farming region.
Sulaiman Bek, along with Altun Kupri, Amerli, Bashir, Bustamli, Mahalabiyah, Qarah Tappah, Tal Afar, Taza Khurmatu, Tuz Khormato, and Yankjah, make up the largest Turkmen-majority cities in Iraq, while Mosul, Kirkuk, Kifri, Daquq, Muqdadiyah, Jalawla, and Saadiyah have significant Turkmen minority populations.