TECO or Teco may refer to:

• Taipei Economic and Cultural Representative Office, a Taiwan representative office alternative to an embassy
• TECO Maritime, an international producer and supplier of cleaning systems for ships
• TECO Electric and Machinery, a Taiwanese company in electric motor, electric appliances and other businesses worldwide
• TECO Energy, an American electrical power company
• Technical Education Center Osceola, a secondary school in unincorporated Osceola County, Florida, US
• Telecooperation Office, a German research group in the field of pervasive Computing at the Karlsruhe Institute of Technology

• TECO (text editor) ("Text Editor and Corrector", originally Tape Editor and Corrector), an early computer text editor
• TECO Line Streetcar, a streetcar line in Tampa, Florida, US
• Teco pottery, produced by American Terra Cotta Tile and Ceramic Company
• Teco (footballer) (born 1982), Brazilian footballer Wender Coelho da Silva

• Tecos F.C., a Mexican football club
• Los TECOS, secret society in Mexico