A deputy commissioner is a police, income tax or administrative official in many different countries. The rank is commonplace in police forces of Commonwealth countries, usually ranking below the Commissioner.
In all Australian police forces, deputy commissioner is the rank directly below that of commissioner and senior to the rank of assistant commissioner. In all forces, excepting the New South Wales Police Force where the insignia is crossed and wreathed tipstaves surmounted by a crown, the same insignia as that of a lieutenant-general in the army, the insignia is a diamond (or a star, in the case of the Victoria Police), the same as that of a major-general in the army.
The deputy commissioner (popularly abbreviated to "DC") is the executive head of the district, an administrative sub-unit of a divisions. Deputy Commissioner is appointed by the government from a Deputy secretary of B.C.S. Administration Cadre.
Hong Kong Police Force have two types of DCs:
The deputy commissioner is the executive head of the district, an administrative sub-unit of a province. In his capacity as district magistrate, he has the overall responsibility of law & order. In his office is also vested the authority to collect Land Revenue and is therefore also titled as collector (revenue)and also to control enchrochment in his area. He usually belongs to the District Management Group cadre of the Central Super Services of the Pakistan.