Helsinki

Area:

City:715.55 km2 (276.3 sq mi)
Land:213.66 km2 (82.5 sq mi)
Water:501.89 km2 (193.8 sq mi)
Urban:770.14 km2 (297.4 sq mi)
Metro:2,970.17 km2 (1,146.8 sq mi)
Area rank:167th largest in Finland

Population:

City:584,420
Rank:Largest in Finland
Density:2,735.28/km2 (7,084.3/sq mi)
Urban:1,036,290
Urban Density:1,345.59/km2 (3,485.1/sq mi)
Metro:1,313,574
Metro Density:442.26/km2 (1,145.4/sq mi)

Population by native language
Finish:84.3% (official)
Swedish:6.1% (official)
Others:9.6%

Population by age:
0 to 14:13.7%
15 to 64:72%
65 or older:14.3%

copy from wikipedia