26th century
The 26th century was defined in the calendar of Earth as being from 2501 until 2600.

Events  
 The Federation has become an even more powerful entity, with species such as Klingons, Ithenites, and Xindi among its citizenry. ()
 A time-travel pod travels to New Jersey in the 22nd century and then to the  in 2368. ()
 Had the Kelvan invasion force in the Milky Way Galaxy remained in control of the , it was theorized that the starship would arrive in the Andromeda Galaxy sometime during this century. However, the Starfleet crew regained control of the vessel, forged a cooperation with the Kelvans, and launched a robot ship towards Andromeda proposing an alliance between the Federation and the Kelvan Empire. ()
 Had the  against Mogh, for aiding and abetting the Romulan attack on the Khitomer Outpost, been upheld by the Klingon High Command in 2366, the family name of the House of Mogh would have been disgraced for seven generations, with the family getting its first chance of returning to grace in this century. ()
 If the statistical calculations of Julian Bashir's colleagues from The Institute concerning the unstoppable Dominion conquest of the Alpha Quadrant had been accurate, then the hypothetical rebellion against Dominion rule would have occurred during this century, assuming an average length of about 30 years for a given generation, plus or minus five years. ()

 The Terran Empire would have succumbed to the galactic revolt predicted by the Halkans, in the approximate prognosis of the , had it not been overthrown prematurely by the Klingon-Cardassian Alliance. ()

 The Federation is claimed to have destroyed the Xindi homeworld in this time. ()

 (presumably)
 In the future shown to Jonathan Archer by , the forces of the Federation defeat the invasion of the Sphere-Builders in the Battle of Procyon V and force them back into their own trans-dimensional realm. The starship  participated in this battle. ()

 A neutron star in a binary star system in the Kavis Alpha sector explodes. ()

 A robot ship launched to the Andromeda galaxy from the Milky Way galaxy directed to Kelva is expected to arrive in this year. ()

 A component that will be used in the Xindi destroyer/probe is manufactured. It is sent to the Xindi in the 22nd century by the Sphere-Builders. ()

 (approximate)
The last known contact between the United Federation of Planets and the Q Continuum occurs. ()

Appendices

26th century productions 
  (in part)

Background information 
 Star Trek: Final Frontier was to be set in this century, specifically the year 2528.
 Going by Data's statement that the energy ribbon from  passes through the Milky Way Galaxy every 39.1 years, it can be expected to return in 2527 and 2566.

External link 
 

de:26. Jahrhundert
es:Siglo 26
fr:26ème siècle
nl:26e eeuw
sv:2500-talet