Berestyn is a city located in the Kharkiv Oblast of Ukraine. It serves as the administrative center of the Berestyn Raion and hosts the administration of the Krasnohrad urban hromada.
The city has undergone several name changes throughout its history, having been formerly known as Krasnohrad or Krasnograd. From 1784 to 1922, it was identified as Kostiantynohrad. As of 2022, the estimated population of Berestyn was 19,674.