Assistant Superintendent, or Assistant Superintendent of Police (ASP), was a rank used by police forces in the British Empire. It was usually the lowest rank that could be held by a European officer, most of whom joined the police at this rank. In the 20th century, it was in many territories opened to non-Europeans as well.

The rank below Assistant Superintendent was usually Inspector, a rank usually held by non-Europeans. The rank above was Deputy Superintendent or Superintendent depending on the force. The rank badge was usually two or three stars ("pips").

The rank is still in use in the Indian Police Service (where it is denoted by one, two or three stars depending on seniority) and the police forces of a number of other Commonwealth countries.