LG3

LG3 or variation, may refer to:


 * La Grande-3 generating station (LG-3), Quebec, Canada
 * Lehrgeschwader 3 (LG 3; Learning Wing 3), WWII German Luftwaffe air wing; that became Gruppe II of Kampfgeschwader 1
 * Gibson LG-3 acoustic guitar, see Gibson L Series
 * Chevrolet LG3, a Chevrolet small-block engine
 * Buick LG3, a Buick V6 engine
 * Laminin G domain 3 (LG3)
 * Lower Group 3, of the Bushveld Igneous Complex
 * Xiaan metro station (station code ) on the Wanda–Zhonghe–Shulin line in Taipei, Taiwan
 * Balvi District, Latvia; see List of FIPS region codes (J–L)