Kowloon (/ ˌ k aʊ ˈ l uː n /) is an urban area in Hong Kong comprising the Kowloon Peninsula and New Kowloon. With a population of 2,019,533 and a population density of 43,033/km 2 (111,450/sq mi) in 2006, it is the most populous area in Hong Kong, compared with Hong Kong Island and the rest of the New Territories. The peninsula's area is about 47 km 2 (18 sq mi).