Kremenets is a city in Ternopil Oblast, western Ukraine. It is the administrative center of the Kremenets Raion, and lies 18 kilometres …Kremenets is a city in Ternopil Oblast, western Ukraine. It is the administrative center of the Kremenets Raion, and lies 18 kilometres north-east of the Pochaiv Lavra. The city is situated in the historic region of Volhynia and features the 12th-century Kremenets Castle. It hosts the administration of Kremenets urban hromada, one of the hromadas of Ukraine. Population: 20,476.