According to the 2021 census, 643,450 people lived in the Athens municipality, making it the largest city in Greece. The second-most populated municipality, Thessaloniki, had approximately 319,050 inhabitants.

Population in the largest city (% of urban population) in Greece was reported at 37.5 % in 2024, according to the World Bank collection of development indicators, compiled from officially recognized sources. Greece - Population in the largest city - actual values, historical data, forecasts and projections were sourced from the World Bank on July of 2025.

Greece GR: Population in Largest City: as % of Urban Population data was reported at 37.274 % in 2017. This records a decrease from the previous number of 37.402 % for 2016. Greece GR: Population in Largest City: as % of Urban Population data is updated yearly, averaging 41.153 % from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 45.213 % in 1975 and a record low of 37.226 % in 2011. Greece GR: Population in Largest City: as % of Urban Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Greece – Table GR.World Bank.WDI: Population and Urbanization Statistics. Population in largest city is the percentage of a country's urban population living in that country's largest metropolitan area.; ; United Nations, World Urbanization Prospects.; Weighted average;

In 2023, the share of urban population in Greece remained nearly unchanged at around 80.67 percent. Nevertheless, 2023 still represents a peak in the share in Greece with 80.67 percent. The urban population refers to the share of the total population living in urban centers. Each country has their own definition of what constitutes an urban center (based on population size, area, or space between dwellings, among others), therefore international comparisons may be inconsistent.Find more key insights for the share of urban population in countries like Italy and Malta.

The annual population growth in Greece increased by one percentage points compared to the previous year. The year 2023 therefore marks a significant change in the population growth compared to the previous year. Population growth deals with the annual change in total population, and is affected by factors such as fertility, mortality, and migration.Find more key insights for the annual population growth in countries like Italy and Malta.