SGA can mean several things, including:
Stargate Atlantis", an American science fiction television series and a spin-off from the television series "Stargate SG-1"
Old Irish language(ISO 639-3 code)
SGA Airlines(Siam General Aviation), a regional airline in Thailand
* Student Government Association, a student organization dedicated to social and organizational activities of the student body
Swedish Game Awards, Sweden's largest video game development competition
* Small for gestational age, babies whose birth weight lies below the 10th percentile for that gestational age
* Scottish Games Association, a
Standard Galactic Alphabet, the writing system in the "Commander Keen" fictional universe
Songwriters Guild of America, an organization to help "advance, promote, and benefit" the profession of songwriters
* Grothendieck's "Séminaire de géométrie algébrique"
Synthetic genetic arrayanalysis - a high throughput methodology for studying genetic interactions
System Global Area, a shared memory structure that is created by Oracle database at instance startup
Swanson Group Aviation, Formerly Superior Helicopter of Glendale, Oregon, a heavy lift helicopter operator
* Simple Genetic Algorithm
* "Schwarz-Gelbe Allianz" (Black-Yellow Alliance), an Austrian political party
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