The Instituto Superior Técnico (IST, also known as Técnico, and stylized TÉCNICO LISBOA; English: Higher Technical Institute) is the school of engineering and technology of the University of Lisbon. It was founded as an autonomous school in 1911, and was integrated into the Technical University of Lisbon (now part of the University of Lisbon) in 1930. IST is the largest school of engineering in Portugal by number of enrolled students, faculty size, scientific production and patents.

IST has three campuses, all located in the Lisbon metropolitan area: the Alameda campus in Lisbon, the Taguspark campus in the Oeiras municipality, and the Tecnológico e Nuclear campus in the Loures municipality. The school is divided in 11 departments that are responsible for teaching undergraduate and postgraduate programs. Each department is organized in sections, which group together specific subjects within its scientific area. In addition, the laboratories of the several departments support the teaching and research activities carried out at IST.

IST is a member of several university partnerships, including CLUSTER, CESAER, T.I.M.E., TPC, and the ATHENS Programme.