Cologne and Surabaya
Comparison by area and population

Cologne

Germany

Surabaya

Indonesia

Population

1 017 155
 (2011)

1 017 155
(2011)

3 282 156
(2008)
3 282 156
 (2008)

Area

405 km2

405 km2

374 km2
374 km2

Population density

2 511.49
/km2

2 511.49/km2

8 775.82/km2
8 775.82
 /km2
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