STL may refer to:

Organisations

  • Council for Religious and Life Stance Communities (Samarbeidsrådet for Tros- og Livssynssamfunn), Norway
  • Send the Light, a British Christian book distributor
  • Space Technology Laboratories, a former division of TRW Inc.
  • Special Tribunal for Lebanon, an international criminal tribunal
  • Standard Telecommunication Laboratories, a former UK research centre for Standard Telephones and Cables

Places

  • St. Louis, Missouri, US
  • St. Louis Cardinals, the city's Major League Baseball team
  • St. Louis Blues, the city’s National Hockey League team
  • St. Louis Lambert International Airport (IATA airport code: STL)
  • Saint Lucia (UNDP country code)
  • St. Laurence High School, co-ed high school in Burbank, Illinois, U.S.

Science and technology

  • Studio transmitter link, of a radio or television station
  • Spurious trip level, of a safety or alarm system

Computing

  • Standard Template Library, originally for the C++ programming language
  • .stl, a file format for subtitles
  • STL (file format), a file format for 3D CAD models
  • Statement List, programming language for Siemens SIMATIC S7

Transportation

  • Société de transport de Laval, public transit in Laval, QC, Canada
  • Société de transport de Lévis, public transit in Lévis, QC, Canada
  • Southall railway station (National Rail station code: STL)
  • Thousand Lights metro station (Chennai Metro station code: STL)
  • St. Louis Lambert International Airport (IATA transport code: STL)

Other uses

  • Soviet Top League, defunct association football league of the Soviet Union
  • Stella Mwangi (born 1986), Norwegian-Kenyan singer also known as STL
  • Licentiate of Sacred Theology (Sacrae Theologiae Licentiatus), a degree in Catholic religious studies
  • St. Thomas League, an association football league in US Virgin Islands
  • Suara Timor Lorosae, a newspaper in East Timor