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İstanbul Kaç Metrekare? How Big Is Istanbul (Size & Population Facts)

How many square kilometers is Istanbul, what's its population, and how is it split between the European and Asian sides? The key facts.

3 min readLast checked 2026-09-28

İstanbul Kaç Metrekare? How Big Is Istanbul?

Istanbul's metropolitan area covers roughly 5,343 square kilometers, making it one of the largest cities in Europe by both area and population — and the largest city in Turkey by a wide margin.

The city is genuinely bicontinental, straddling the Bosphorus strait between Europe and Asia. Around two-thirds of Istanbul's roughly 15.75 million residents live on the European side, with the remaining third on the Asian side, connected by bridges, tunnels, and an extensive ferry network.

For comparison, Istanbul's metropolitan area is larger than many entire countries by land area, and its population alone exceeds that of most European nations' largest cities combined.

Total area

~5,343 km²

Population

~15.75 million

European vs Asian side

~2/3 vs ~1/3 of residents

Istanbul by the Numbers

Total metropolitan area

Figure
~5,343 km² (2,063 sq mi)

Population

Figure
~15.75 million (as of late 2025)

Continents

Figure
2 (Europe and Asia)

Residents on European side

Figure
~2/3 of the population

Residents on Asian side

Figure
~1/3 of the population

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