Merseyside Police is the territorial police force responsible for policing Merseyside in North West England. The force area is 647 square kilometres with a population of around 1.5 million. As of March 2009 the force has 4,494 police officers, 2,221 staff, 442 police community support officers and 420 special constables.
Merseyside Police is divided into six Basic Command Units (BCUs), one in each of the metropolitan boroughs that make up Merseyside, and two BCUs for the City of Liverpool. The BCUs are: