5 Largest Police Departments in the US

4. Philadelphia (PA) Police

Number of Full-Time Sworn Personnel: 6,031

Population Served: 1,567,872

Personnel per 10,000 Residents: 38

The Philadelphia police department was formed in 1854, which makes it one of the oldest police departments in the US. With over 6,000 sworn personnel and 800 civilian personnel, it is one of the largest police departments in the country.