Arsin is a municipality and district of Trabzon Province, Turkey. Its area is 157 km, and its population is 30,911. It is on the Black Sea coast, ea…Arsin is a municipality and district of Trabzon Province, Turkey. Its area is 157 km, and its population is 30,911. It is on the Black Sea coast, east of the city of Trabzon. The mayor is Hamza Bilgin, a member of YRP.