TECO may refer to
- TECO (text editor) ("Text Editor and Corrector", originally Tape Editor and Corrector), an early computer text editor and predecessor to Emacs.
- TECO Electric and Machinery (in Chinese: 東元電機), a Taiwanese company in electric motor, electric appliances and other businesses worldwide.
- TECO Energy, an American electrical power company.
- TECO Line Streetcar System, a streetcar line in Tampa, Florida.
- TECO Maritime, an international producer and supplier of cleaning systems for ships.
- Teco pottery, produced by American Terra Cotta Tile and Ceramic Company.
- Taipei Economic and Cultural Representative Office, a representative office fulfilling some of the functions of an embassy or consulate general, established by the Republic of China (Taiwan) in countries that do not have formal diplomatic relations.
- Technical Education Center Osceola, a secondary school in unincorporated Osceola County, Florida.
- Telecooperation Office is a German research group in the field of pervasive Computing at the Karlsruhe Institute of Technology.
- Wender Coelho da Silva, Brazilian footballer whose nickname is "Teco".