Kostiantynivka

Kostiantynivka (Ukrainian: Костянтинівка, IPA: [kosʲtʲɐnˈtɪn⁽ʲ⁾iu̯kɐ] ; Russian: Константиновка, romanized: Konstantinovka) is an industrial city in Donetsk Oblast, eastern Ukraine. Kostiantynivka is considered the capital of the glass industry of Ukraine. Together with neighboring cities, it forms the Kramatorsk agglomeration. During the Soviet era, the city developed into a major centre for the production of ferrous and non-ferrous metallurgy, glass, iron, zinc, steel, chemical, and construction industries, as well as an important transit railway junction. It was the administrative center of the Kostiantynivka Raion until 2020, although it did not belong to it. After the raion was abolished, Kostiantynivka was incorporated into the Kramatorsk Raion and Kostiantynivka urban hromada. Its population was approximately 67,350 (2022 estimate). The population declined sharply due to Russian offensives towards the city, from ~15,000 in February 2025, ~8500 in July 2025, to ~6800 in August 2025. In late 2025, the city became an active battleground between Russian and Ukrainian military forces. By early 2026, the Donetsk Regional State Administration estimated the population of Kostiantynivka to be at ~2,800.