The Immigration Department of the Government of Hong Kong is responsible for immigration control of Hong Kong. After the People's Republic of China assumed sovereignty of the territory in July 1997, Hong Kong's immigration system remained largely unchanged from its British predecessor model. Residents from mainland China do not have the right of abode in Hong Kong, nor can they enter the territory freely, both before and after 1997. There are different regulations that apply to residents of Macau, another Special Administrative Region of China. In addition, visa-free entry acceptance regulations into Hong Kong for passport holders of some 170 countries remain unchanged before and after 1997.

The visa policy of Hong Kong deals with the requirements in which a foreign national wishing to enter Hong Kong through one of the 15 immigration control points must meet to obtain an entry permit or Visa, which depending on the traveller's nationality, may be required to travel to, enter, and remain in the Hong Kong Special Administrative Region. Visitors from over 145 countries are permitted without Visa entry for periods ranging from 7 to 180 days, to the Hong Kong Special Administrative Region for tourism or certain business-related activities. All visitors must hold a passport valid for more than 1 month.