In the political systems of Hong Kong, a functional constituency is a professional or special interest group involved in the electoral process. Eligible voters in a functional constituency may include natural persons as well as other designated legal entities such as organisations and corporations.

The politics of Hong Kong takes place in a framework of a political system dominated by its quasi-constitutional document, the Hong Kong Basic Law, its own legislature, the Chief Executive as the head of government and of the Special Administrative Region and of a politically constrained multi-party presidential system. The Government of the Hong Kong Special Administrative Region of the People's Republic of China is led by the Chief Executive, the head of government.