Kostiantynivka (Костянтинівка, Константиновка) is an industrial city in the Donetsk Oblast (province) of eastern Ukraine, on the Krivoy Torets River, the center of Kostiantynivka Raion (district). It`s also known as Kostyantynivka or Konstantinovka. It developed in the Soviet era into a major centre for the production o....