- Sinop is a city located on the Black Sea coast in northern Turkey. It is the capital of the Sinop Province and has a population of approximately 37,000 people. The city is known for its rich history, with evidence of human settlement dating back to ancient times. Sinop is famous for its picturesque natural beauty, including its stunning coastline, sandy beaches, and green landscapes. It also has several historical sites and landmarks, such as the Sinop Castle, which was built in the 7th century and offers panoramic views of the city. Tourism, fishing, and agriculture are the main economic activities in Sinop.