Penza's 2025 population is now estimated at 520,546. In 1950, the population of Penza was 190,030. Penza experienced a decrease of -141 residents over the past year, marking an annual decline of -0.03%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Penza, which typically includes Penza's population in addition to adjacent suburban areas.