Horlivka, also known as Gorlovka, is a city in Donetsk Oblast of Ukraine. Its population is 239,828. Economic activity is predominantly coal min…Horlivka, also known as Gorlovka, is a city in Donetsk Oblast of Ukraine. Its population is 239,828. Economic activity is predominantly coal mining and the chemical industry. The Horlivka Institute for Foreign Languages has a two-building campus in the city centre.