Federation space
Federation space or Federation territory was the region of space occupied or territory claimed by the United Federation of Planets.

Location and size 
See also: Federation members and Federation colonies
Federation space was located approximately thirty thousand light years from the core of the galaxy, located within the Orion Arm, on the border of the Alpha and Beta Quadrants. (; ; VOY Season 7 production art) 

During the  of 2256-57, 20% of Federation territory came under Klingon occupation. ()

According to James T. Kirk, as of 2267, the Federation was "on a thousand planets and spreading out." ()

As of 2370, there were "countless M class planets in Federation space which can support" humanoid life. ()

In 2369, Cmdr. Sisko described the Federation to be made up of "over a hundred planets." In 2372, Cpt. Janeway said it "consists of over 150 different worlds." The following year, Cpt. Picard repeated this number and specified the Federation's territory to be spread across eight thousand light years. (; ; ) 

During the Dominion War, the Female Changeling gave Weyoun the impression that once the Dominion won, that all Federation territories would fall under his jurisdiction, including Earth. Weyoun was later disappointed to learn that she later promised the Breen Confederacy the same terms, explaining that "I would promise the Breen the entire Alpha Quadrant if I thought it would help win this war." ()

By 3189, approximately 120 years after the galaxy wide event known as "The Burn", which decimated warp faring civilization, the Federation was reduced to only 38 formal member worlds, from a high of 350. ()

Outside of Federation space 
The Kaleb sector was located just outside of Federation space. ()

The planet Kurl was, according to William T. Riker, "a hell of a long way outside Federation territory." ()

Neighboring powers 
It maintained borders with many notable powers, including the Klingon Empire (Federation-Klingon border), the Romulan Star Empire (Romulan Neutral Zone), the Gorn Hegemony, the Tholian Assembly, the Cardassian Union (Federation-Cardassian border, DMZ), the Sheliak Corporate, the Talarians, and the Tzenkethi. (; ; )

Border territory 
The coordinates 140 by 205 were considered to be within Federation space, located adjacent to the Romulan Neutral Zone. () 

The Federation's Argus Array, a remote subspace telescope, was located at the very edge of Federation space near Cardassian space in 2370. () The McAllister C-5 Nebula was located just across the Cardassian border, approximately seven light years from Federation space. ()

Krios, homeworld of the Kriosians, was the only Klingon colony located on the border of Federation space as of 2367. ()

The Typhon sector, located within the flight path of a Borg cube that was on course for Earth in 2373, was located near the border of Federation space. ()

Laws 
Laws for operating in Federation space were established to protect its citizens and aliens alike. 

According to the terms of the Klingon-Federation treaty, Klingons have "every right to free transit through Federation space" and they cannot be boarded or subjected to search without just cause. ()

According to the Ferengi arms dealer , he conducted his arms business outside of Federation space, so that "Starfleet can't touch us." ()

Background information 
The Federation was generally referred to as an Alpha Quadrant power, particularly in , which presented the Dominion War as a fight for control of the Alpha Quadrant. Background sources, including the Star Trek: Star Charts, have long depicted the Federation as incorporating both Alpha and Beta Quadrant areas, an idea which was originally intended to rationalize Kirk's line in  that the  was the only ship in the quadrant. (). Evidence of the Federation's multi-quadrant status long remained elusive, but a map seen in "Magic to Make the Sanest Man Go Mad" finally established otherwise. 

According to the official  website, the Federation consisted of 120 members and 700 colonies as of 2258 in the alternate reality.  In a deleted scene from Star Trek Into Darkness, a region of space depicting Federation space was labeled with the title "Alpha Quadrant". According to Star Trek: Star Charts'' ("United Federation of Planets IV"), in 2378, the area of the Federation was eight thousand cubic light years and there were 183 members and 7,128 affiliates.
Federation
Regions