Sofia (stolitsa) is the top region by population density in Bulgaria. As of 2015, population density in Sofia (stolitsa) was 1,029.8 inhabitants per square kilometre that accounts for 41.43% of Bulgaria's population density. The top 5 regions (others are Varna, Plovdiv, Ruse, and Stara Zagora) account for 57.05% of it. Bulgaria's total population density was estimated at 2,485.5 inhabitants per square kilometre in 2015.
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