5 Largest Police Departments in the US

2. Chicago (IL) Police

Number of Full-Time Sworn Personnel: 11,965

Population Served: 2,704,958

Personnel per 10,000 Residents: 44

The Chicago Police Department serves 25 districts with a collective residential size of 2.7 million individuals. In 2023, the department received 77,523 crime complaints, a 55% increase from 2019. The highest number of complaints were related to motor vehicle theft, followed by theft and then robbery.