Kopeysk is a city located in the Chelyabinsk Oblast region of Russia. It is situated southeast of the city of Chelyabinsk.
According to census data, the population of Kopeysk has seen significant fluctuations over recent decades. The 2021 census recorded a population of 147,806, following a figure of 137,601 in 2010 and 73,342 in 2002. The growth observed between 2002 and 2010 was primarily attributed to the annexation of surrounding settlements.