Interstellar Space Agency
|name = Interstellar Space Agency |owner = The Coalition |headquarters = Hellas City, Central Mars |spaceport = Central Martian Spaceport
|acronym =
- ISA
|established = 16 April 2241
|employees = 12,000,000 (2273)
|administrator = Ali Temesgen (Director General of the Interstellar Space Agency)
|budget = 
U€1.7 quadrillion (2273)
|language = English, French and German (working languages)
|website = isa.int
The Interstellar Space Agency (ISA) is an independent agency of the Coalition that represents all of humanity in interstellar spaceflight. It operates in cooperation with many of humanity’s individual space agencies, high-energy physics organisations, and megacorporations.