LSQ may refer to: Les Stewart Quartet, a predecessor of the band The Quarrymen Load-Store Queue, a structure used by some computer CPUs' memory disambiguation mechanisms Agua Santa Airport (IATA airport code: LSQ), Los Ángeles, Chile Quebec Sign Language (), a sign language used in Canada Lone Scout Quill, a grade of scouting of the Lone Scouts of America Least squares, a technique of equation fitting