The Phoenix Police Department is the law enforcement agency responsible for the city of Phoenix, Arizona. As of October 2021, the Phoenix Police Department comprises just under 2,800 officers, some 350 below authorized strength of 3,125 and more than 1,000 support personnel. The department serves a population of more than 1.6 million and patrol almost 516 square miles (1,340 km2) of the fifth largest city in the United States. Phoenix has one of the highest rates of police killings in the United States.