SEC, sec, or Sec may refer to:

Government Securities and Exchange Commission (disambiguation) United States Securities and Exchange Commission State-owned Enterprises Commission, Taiwan State Examinations Commission, Ireland State Electricity Commission of Victoria, Australia

Sports Southeastern Conference, a collegiate athletics conference operating primarily in the southeastern United States Southeast Conference (Wisconsin), a high school athletic conference in southeastern Wisconsin, U.S. Speedway European Championship, an annual individual speedway event

Science Saga execution coordinator, a component of the saga interaction pattern in computer science Sec, a secretion system in bacteria Secant function, in mathematics Size-exclusion chromatography Space Weather Prediction Center, formerly Space Environment Center Selenocysteine, an amino acid Secondary Electron Conduction Tube, a part of the Apollo TV camera SEC experiment, or Scattering Experiment Chambers, at CERN

Companies Samsung Electronics Co., Ltd., an electronics company Solar Entertainment Corporation, a Filipino media company

Places Seč (disambiguation), in Central Europe

Other uses Dalek Sec, a Doctor Who character Scottish Episcopal Church Sec (wine), a French term used to indicate the sweetness level of a wine SEC Armadillo, an auditorium in the Scottish Event Campus, Glasgow SEC Centre, an exhibition centre in the Scottish Event Campus, Glasgow Secco, a musical term meaning "dry", "without resonance" or "quick" Second, abbreviated sec, a unit of time Section (typography), a subdivision of a chapter St Edmund's College, Ipswich Mercedes-Benz SEC Secondary Education Certificate, a part of the education system in Malta Sechelt language (ISO 639-3 code: sec)

See also Sxc (disambiguation) Section (disambiguation)