Tetra Pak is a Swedish–Swiss multinational food packaging and processing company with head offices in Lund, Sweden, and Pully, Switzerland. The company offers packaging, filling machines and processing for dairy, beverages, cheese, ice cream and prepared food, including distribution tools like accumulators, cap applicators, conveyors, crate packers, film wrappers, line controllers and straw applicators.

Tetra Pak was founded by Ruben Rausing and built on Erik Wallenberg's innovation, a tetrahedron-shaped plastic-coated paper carton, from which the company name was derived. In the 1960s and 1970s, the development of the Tetra Brik package and the aseptic packaging technology made possible a cold chain supply, substantially facilitating distribution and storage. From the beginning of the 1950s to the mid-1990s, the company was headed by Rausing's two sons, Hans and Gad, who took the company from a family business with six employees in 1954 to a multinational corporation, operating in more than 160 countries and with over 25,000 employees as of 2021.

The company is privately owned by the family of Gad Rausing through the Swiss-based holding company Tetra Laval, which also includes the dairy farming equipment producer DeLaval and the PET bottle manufacturer Sidel.