SG1 (disambiguation)

SG1 commonly refers to Stargate SG-1, a television show.

SG1 may also refer to:
 * SG1 (or SG/1), a version of the Heckler & Koch G3 rifle
 * SG1, a minor planet notation indicating the thirty-third discovery in late September of a given year, see provisional designation in astronomy
 * 1941 SG1, the asteroid 1546 Izsák
 * 1955 SG1, the asteroid 4300 Marg Edmondson
 * 1973 SG1, the asteroid 14792 Thyestes
 * 1974 SG1, the asteroid 2756 Dzhangar
 * 1987 SG1, the asteroid 6474 Choate
 * 1989 SG1, the asteroid 7934 Sinatra
 * 1992 SG1, the asteroid 7250 Kinoshita
 * Scanlan SG-1, a glider
 * Schlachtgeschwader 1, a German Luftwaffe unit during World War II
 * SG1 postcode district, in the SG postcode area, in Stevenage in the United Kingdom