toggle hong kongHong 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.Hong 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.