What was the population of Kowloon City, an area in Kowloon, Hong Kong, by 1990?
Kowloon City: Kowloon City () is an area in Kowloon, Hong Kong. Kowloon Walled City:  By 1990, the Walled City contained 50,000 residents within its 2.6 ha borders.
50,000 residents