I live in the Samseong area of Gangnam in Seoul. Samseong is an office ward, and at only 3.19 km2 (1.23 sq mi) it's pretty small. It's population as of 2001 (this is the most recent stat I could find. The population must be much, much larger now judging by all of the new apartment buildings around) was 41,171 (12,906/km2 - 33,430/sq mi).
The current city population of Seoul is 9,838,892 (16,000/km2 - 42,000/sq mi) with a metro pop. of 25,600,000.
Samseong is to the left of Seoul Tower. Where the skyscraper is with the purple lights.
overitall in by
Andrew Rochfort, on Flickr