structural:reformatting, linguistic:voice_change, structural:summarization
Population

In 1600, approximately 20,000 inhabitants resided in the whole Poznań conurbation. By 1732 the population had dropped to 4,000 due to wars, floods and plague. Historically, its growth rate was high throughout the 19th and 20th centuries; in the year 1900 approximately 110,000 people were registered as residents and by 1939 there was already 274,155 people. The population of Poznań has declined steadily since 1990, when it reached a maximum of 590,101. This phenomenon, which also affected other European cities, is caused in part by the growth of satellite suburbs at the expense of the downtown region within the city proper. In 2020, Poznań had 532,048 registered inhabitants being the fifth most populous town in Poland, while the metropolitan area had a population of about 1,000,000 people. The city's population density was 5,300 people per square mile (2,000 people/km).

Contemporary Poznań has one of the highest concentration of foreigners in Poland alongside Warsaw and Wrocław; a significant majority are migrant workers from Ukraine; others came from Italy, Spain, Belarus, Russia and Serbia. No exact statistic exists on the number of temporary residents from abroad. Many are students studying at Poznań's schools and institutions of higher learning.