Lg1

lg1 or variation, may refer to:


 * La Grande-1 generating station (LG-1), Quebec, Canada
 * Lehrgeschwader 1 (LG 1; Training Wing 1), WWII German Luftwaffe air wing
 * GIAT LG1, 105 mm towed howitzer
 * Gibson LG-1 acoustic guitar, see Gibson L Series
 * First late glacial (LG1), a period of the Older Dryas ice age
 * Laminin G domain 1 (LG1)
 * Lower Group 1, of the Bushveld Igneous Complex
 * Chiang Kai-shek Memorial Hall metro station (station code ) on the Tamsui–Xinyi line, Songshan–Xindian line, and Wanda–Zhonghe–Shulin line in Taipei, Taiwan
 * Aizkraukle District, Latvia; see List of FIPS region codes (J–L)