Saint Petersburg, the second-largest city in Russia, stands as a prominent hub of industrial, scientific, and cultural significance. Encompassing an area of 85,300 km squared, including both the city itself and the Leningrad region, it boasted a population of 7.4 million in 2022, representing 5.2% of Russia’s total population. This figure is expected to hold steady through 2030. In 2022, the population density was recorded at 87 people/km squared, with the majority being of working age (66.5%), followed by the young (16.0%) and the elderly (17.5%). The total dependency ratio saw an increase from 44.7% in 2018 to 50.3% in 2022, projected to rise to 54.4% by 2030.