TCO may refer to:


  • Swedish Confederation of Professional Employees (Tjänstemännens Centralorganisation), a Swedish confederation of trade unions
  • TopCoder Open, an event by TopCoder
  • The Cinematic Orchestra, a British-based jazz and electronic music outfit
  • TCO AS, a Norwegian-founded oilfield service company, specializing in the design, manufacture and installation of completion barrier plugs (laminated glass barrier plugs), chemical injection systems, topside chemical injection systems, multi-cycle valves and B-annulus relief systems, as well as the provision of tubing-conveyed perforating (TCP) equipment and services.

Science and technology