The Starfleet Sector Guard was an organization within the Federation Starfleet.

In 2374, Captain Charlie Reynolds contacted the Starfleet Sector Guard in order to inform them the location of Dominion starship they had disabled. (DS9 novel: Call to Arms...)

Divisions and agencies of Starfleet
	Academy • Administration • Advanced Starship Design Bureau • Advanced Technologies • Appeals Board • Bureau of Information • Bureau of Standards • Command • Communications • Control • Corps of Engineers • Criminal Investigative Service • Cultural Affairs • Dental • Exploratory Division • Headquarters • Intelligence • Inspector General • Internal Affairs • Judge Advocate General • Marine Corps • Materiel Supply Command • Medical • Mission Operations • Operations • OSHC • Orbital Operations • Research and Development • Sector Guard • Security • Special Security Division • Science • Shipyards Operations • Stellar Imaging • Strategic Command • Tactical • Technology Assessment Directorate • Training Command