Diamond Hill is a hill in the east of Kowloon, Hong Kong. The name also refers to the area on or adjacent to the hill. It is surrounded by Ngau Chi Wan, San Po Kong, Wong Tai Sin and Tsz Wan Shan. Its northeast is limited by the ridge. It is principally a residential district. Administratively, the area is part of Wong Tai Sin District.

Kowloon is an urban area in Hong Kong comprising the Kowloon Peninsula and New Kowloon. It has a population of 2,019,533 and a population density of 43,033/km2 (111,450/sq mi) in 2006. It is one of the three regions of Hong Kong, along with Hong Kong Island and the New Territories, and is the smallest and most densely populated.