Les
LES or Les may refer to:
People
- Les (given name)
 - Les (surname)
 - L.E.S. (producer), hip hop producer
 
Space flight
- Launch Entry Suit, worn by Space Shuttle crews
 - Launch escape system, for spacecraft emergencies
 - Lincoln Experimental Satellite series, 1960s and 1970s
 
Biology and medicine
- Lazy eye syndrome, or amblyopia, a disorder in the human optic nerve
 - The Liverpool epidemic strain of Pseudomonas aeruginosa
 - Lower esophageal sphincter
 - Lupus erythematosus systemicus
 
Places
- The Lower East Side neighborhood of Manhattan, New York City
 - Les, Catalonia, a municipality in Spain
 - Leş, a village in Nojorid Commune, Bihor County, Romania
 - Les, the Hungarian name for Leșu Commune, Bistriţa-Năsăud County, Romania
 - Les, a village in Tejakula district, Buleleng regency, Bali, Indonesia
 - Lesotho, IOC and UNDP country code
 - Lès, a word featuring in many French placenames
 
Transport
- Leigh-on-Sea railway station, National Rail station code
 - Leytonstone tube station, London Underground station code
 
Other uses
- "L.E.S.", a song by Childish Gambino from Camp (album)
 - Lake-effect snow
 - Large eddy simulation in fluid dynamics
 - Law Enforcement Sensitive, a US security classification
 - Leave and Earnings Statement, of US military
 - Les (Vietnam), a Vietnamese term for lesbians
 - Les+ Magazine, a Chinese LGBT magazine
 - Licensing Executives Society International, a US intellectual property organization
 - Life Extension Society, a cryonics organization
 - Lifetime Entertainment Services, a US company
 - Lilliput Edison screw, a 5mm light bulb socket
 - Louisiana Energy Services, which operates the National Enrichment Facility