In Hong Kong, localism is a political movement centered on the preservation of the city's autonomy and local culture. The Hong Kong localist movement encompasses a variety of groups with different goals, but all of them oppose the perceived growing encroachment of the Chinese central government on the city's management of its own political, economic, and social affairs. Issues of concern to localist camp include land use and development, cultural and heritage conservation on the left, parallel trading and the increasing number of mainland immigrants and tourists on the right. On the autonomy of Hong Kong, many of them advocate the Hong Kong people's right to self-determination, while milder elements advocate for greater autonomy while remaining part of China, and the most radical call for return to British rule or full independence as a sovereign state. Certain right-wing localist camp also advocate for a more aggressive and militant approach in defending popular interests.

Hong Kong is a special administrative region of the People's Republic of China. With 7.4 million residents of various nationalities in a 1,104-square-kilometre (426 sq mi) territory, Hong Kong is one of the most densely populated territories in the world.