LSS may refer to: L. S. Sheshagiri Rao, Indian writer and scholar of Kannada literature Lakeland School System, school district in Lakeland, Tennessee Landing Ship Stern Chute, a converted train ferry used early in WW2 as Dock landing ship Langstaff Secondary School, Richmond Hill, Ontario Large-scale structure of the universe Large Space Simulator, Space simulator Last Song Syndrome Laurel Springs School, Ojai, California, United States Lawrence Sheriff School, Rugby, Warwickshire Law Society of Saskatchewan Lean Six Sigma, a synergized managerial concept of Lean manufacturing and Six Sigma Leicester Secular Society, the world's oldest Secular Society Licentiate of Sacred Scripture, see Licentiate of Sacred Theology Life Saving Society Life Span Study of atomic bomb survivors, see Epidemiology data for low-linear energy transfer radiation Lithic Studies Society Lincoln Square Synagogue, Manhattan, New York City Linhard–Scharff–Schiøt theory in ion physics Logistics Support System London School of Sound, school of music production based in London, United Kingdom Lone Star Showdown, the official rivalry between the Texas A&M Aggies and the Texas Longhorns Lone Star Steel Company, a tubular steel mill in Lone Star, Texas LSS (gene), an enzyme LSS (Lynxmotion Smart Servo), a series of hobbyist-grade smart actuators created by RobotShop Inc. LSS (film), a 2019 Philippine film LSS Data Systems, a medical software company Lumbar spinal stenosis, a medical condition in which the spinal canal narrows Lunds Studentsångförening, a Swedish male-voice choir XM26 Lightweight Shotgun System