Home Affairs Bureau (Chinese: 民政事務局) is one of the policy bureaux of the Hong Kong Government.

One of the important roles of the Home Affairs Bureau is to enhance liaison and communication with all sectors of the community including the Legislative Council and the general public.

Tsang Tak-sing has been the Secretary for Home Affairs since July 1, 2007.

Home Affairs is responsible for policies such as:

List of agencies linked to HAB:

Advisory committees

Non-departmental public bodies

Appeal boards

Advisory and management boards of trusts

Miscellaneous boards and committees

An interior ministry (sometimes ministry of home affairs) is a government ministry typically responsible for policing, national security, and immigration matters. The ministry is often headed by a minister of the interior or minister of home affairs. In some countries, matters relating to the maintenance of law and order and the administration of justice are the responsibility of a separate justice ministry.

In countries with a federal constitution, an interior minister will often be found at both the federal and state levels. Similarly, autonomous entities and dependent territories may also have interior ministers.

In certain jurisdictions, similarly named government departments may have other responsibilities. In the United States, the Department of the Interior has radically different functions—primarily the management and conservation of land owned by the federal government, and programs and policies dealing with indigenous peoples of the U.S. The functions that fall under what most other countries call an "interior ministry" are under other government departments—mostly the Department of Homeland Security, with some others falling under the Department of Justice.