from Wiki:
In most
U.S. police departments, the rank of Captain is immediately above
lieutenant. A
Police Captain is often the officer in charge of a
precinct. In the
New York City Police Department, the rank of
Captain is below deputy
inspector. Unlike the military version, where the rank of Captain may be held by junior officers with 4–6 years of service, Police and Fire Captains are usually veterans with extensive experience. In some smaller U.S. police departments, a person holding the rank of
Police Captain may be in charge of a division (Patrol Division, Detective Division, etc.) within that department. In larger police departments however, a
Police Captain may command only one section of a precinct which is commanded by either a Police Major, Police Inspector, or the next highest rank. Nevertheless, the rank of
Police Captain is separated from the ranks of
Police Lieutenant and
Police Sergeant, in the fact that a
Police Captain is considered upper-level management in most large urban police departments; therefore, the rank carries much more than lower
police ranks in terms of prestige and influence.