LAC's a three-letter abbreviation that may refer to: California State Prison, Los Angeles County L2TP Access Concentrator La Crescenta, California Lancashire Aero Club Latin America and the Caribbean, in the United Nations geoscheme Latin America and the Caribbean, UNESCO region Latin American Countries (Latin America) Leading Aircraftman Liberal arts college Library and Archives Canada Library of American Civilization Lignes Aériennes Congolaises (defunct airline of the Democra… (More on Lac)