Alchevsk (Ukrainian: Алчевськ, translit. Alchevs'k, Russian: Алчевск) is a city in the Luhansk Oblast (province) of eastern Ukraine. It is separate administrative unit, and is located approximately 45 km from the oblast capital, Luhansk, and right next to the district capital of Perevalsk.
The current estimated population is 120,000 (as of 2004).
Alchevsk is one of the largest industrial centers in the Donbas, and comprises a quarter of the entire oblast's production. The city economy depends on OJSC "Alchevsk Iron & Steel Works" and "Alchevsk Coke-Chemical Plant" companies.
The city was known as Voroshylovsk (Ukrainian: Ворошиловськ) from 1931 to 1961, and then Komunarsk (Ukrainian: Комунарськ) until 1991.