ELS or Els may refer to:
Education Emerson Literary Society, a social society at Hamilton College Empirical legal studies English Language School, Dubai Europeesche Lagere School, a school system in the colonial Dutch East Indies Expeditionary learning schools, in the United States
Medicine and science Early Life Stage test, a chronic toxicity test Eaton–Lambert syndrome, a muscle disease Editor in the Life Sciences, a professional certification ELS cotton (Gossypium barbadense), a species of cotton Encyclopedia of Life Sciences, an online encyclopedia
People Els (given name), a feminine given name short for Elisabeth Ernie Els (born 1969), South African golfer Jurie Els, South African singer
Technology Effortless loading system, proprietary name for a Tip-up barrel on offer from Beretta in models such as the Beretta 30X Electrophoretic light scattering Engineered Lifting Systems & Equipment, a Canadian manufacturing company Ensemble de Lancement Soyouz, a launch pad at Guiana Space Centre Extreme Loading for Structures, structural analysis software Emergency Light System, emergency lighting installed on emergency vehicles
Other uses Els (Streu), a river in Germany El Salvador, UNDP country code East London Airport, in South Africa Edinburgh Labour Students, a student wing of the Labour Party of the United Kingdom Elsternwick railway station, Melbourne Equidistant letter sequence, a bible code method Escanaba and Lake Superior Railroad, in the United States Evangelical Lutheran Synod, a US-based Protestant Christian denomination Liberation Army of the South (), an armed group active during the Mexican Revolution