http://www.wolframalpha.com/input/?i=population+density+by+c...
http://www.wolframalpha.com/input/?i=population+density+by+c...
Less than 25% of total land area of ~400 sq. mi. is actually developed.[0] The average density of those developed areas is thus incredibly high. Mong Kok for example, has a density of 340,000 / sq. mi., which is described as the highest population density of any district in the world.[1]
[0] http://www.gov.hk/en/about/abouthk/facts.htm
[1] http://www.boston.com/bigpicture/2011/11/world_population_wh...
That is nothing short of astonishing. Are the parks and undeveloped areas open to the public?
http://en.wikipedia.org/wiki/File:Hong_Kong_Parkview_2.jpg
The downside is that housing is close to the least affordable in the world with respect to median income. The average flat size is ~450 sq. ft., (of which typically less than 80% is actually the inside of the flat itself).
There have been a number of photo exhibits of late depicting the housing conditions that a significant portion of the population have to deal with:
http://www.psfk.com/2013/02/hong-kong-micro-slums.html
http://www.dailymail.co.uk/news/article-2306842/Stunning-ima...
Check out the view from abovehttp://www.airpano.com/360Degree-VirtualTour.php?3D=honkong