The department's organization and resources are complex, including 21 community stations (divisions) grouped in four bureaus under the Office of Operations multiple divisions within the Detective Bureau under the Office of Special Operations and specialized units such as the Metropolitan Division, Air Support Division, and Major Crimes Division under the Counterterrorism & Special Operations Bureau. The LAPD is headquartered at 100 West 1st Street in the Civic Center district. With 8,967 officers and 3,000 civilian staff, it is the third-largest municipal police department in the United States, after the New York City Police Department and the Chicago Police Department. The Los Angeles Police Department ( LAPD), officially known as the City of Los Angeles Police Department, is the primary law enforcement agency of Los Angeles, California, United States.