TLG

TLG may refer to:


 * Tea Leaf Green, a band
 * The Lego Group, a company that manufactures LEGO toys
 * The Lion Guard, an animated TV series
 * The Little Gym, an international franchise of children's gyms
 * The Livingston Group, a lobbying firm based in Washington, D.C.
 * The Lying Game, a TV series
 * Thesaurus Linguae Graecae, a research centre at the University of California
 * Tiger Leaping Gorge, a canyon in China
 * Top Level Group, a parliamentary group in the United Kingdom
 * Trilegiant Corporation, a subsidiary of the Affinion Group
 * Troll Lord Games, a publisher of games
 * The Limits to Growth, a 1972 computer model of exponential economic growth with finite resources