Metallostroy is a municipal settlement located in the Kolpinsky District of the federal city of St. Petersburg, Russia. It serves as one of the residential areas within the metropolitan region.
According to census data, the population of Metallostroy has fluctuated over recent decades. The 2010 census recorded a population of 26,361 residents, following a count of 25,675 in 2002 and 22,940 during the 1989 Soviet census.