toggle hong kongHong Kong [e] is a special administrative region of China. With 7.5 million residents in a 1,114-square-kilometre (430 sq mi) territory, Hong Kong is the fourth most densely populated region in the world.Hong Kong is officially part of the People’s Republic of China. But—and this is crucial— it’s not just another Chinese city. Hong Kong is classified as a Special Administrative Region (SAR) under Chinese law.