TEC or Tec may refer to:
Education
Trichy Engineering College, in Konalai, Tamil Nadu, India
Costa Rica Institute of Technology
Tec, the Monterrey Institute of Technology and Higher Education
Tertiary Education Commission (disambiguation)
Texas Eastern Conference, an American junior college athletic conference
Governmental and public organizations
Tasmanian Electoral Commission, Australia
The Exploration Company
Telecommunication Engineering Centre, an Indian government agency
Tsunami Evaluation Coalition
Transatlantic Economic Council, directs economic cooperation between the US and the EU
Training and enterprise council, former public bodies in th UK
Topographic Engineering Center, former name of the US Army Geospatial Center
Treaty establishing the European Community
Transitional Executive Council, historic South African organization
Military
TEC-3 or Technician third grade, United States Army rank
TEC-4 or Technician fourth grade, United States Army rank
TEC-5 or Technician fifth grade, United States Army rank
I.G. Brown Air National Guard Training and Education Center, Knoxville, Tennessee
People
Nechama Tec, Professor Emerita at the University of Connecticut
Roland Tec, American writer and movie director
Science, engineering and medicine
TEC (gene), a human gene
Thermoelectric cooler, devices employing the Peltier effect
Time error correction
Transient erythroblastopenia of childhood, a medical condition
Threshold Exceeds Condition, a value used in computer hard disk evaluation
Total electron content, a descriptive quantity of the Earth's ionosphere
TEC, a Russian abbreviation for thermal power stations in Russia and Soviet Union with combined heat and power plant
Other uses
Tech (river) (Catalan: Tec), Pyrénées-Orientales département, France
TEC-9, a semi-automatic pistol
Tec (album), a 2023 album by Lil Tecca
SV TEC, a Dutch association football club
Terik language (ISO 639-3 code: tec), spoken in Kenya
Toshiba TEC Corporation, a subsidiary of Toshiba
Tower en route control, a collection of air-traffic routes
TRACE Expert City, an office complex in Sri Lanka
Transport En Commun, a brand name of Belgian transport company Société Régionale Wallonne du Transport
Turkish Engine Center, an aircraft engine maintenance and repair shop
TEC, a character in Paper Mario: The Thousand-Year Door