Mathematics and Mechanics of Complex Systems (MEMOCS) is a quarterly peer-reviewed scientific journal founded by the International Research Center for the Mathematics and Mechanics of Complex Systems (M&MoCS) from Università degli Studi dell'Aquila, in Italy.

The co-chairs of the editorial board are Francesco dell'Isola and Gilles Francfort, and chair managing editor is Martin Ostoja-Starzewski.

It is open access, free of author charges (being supported by grants from academic institutions), and available in both printed and electronic forms.

The journal also publishes original research in related areas of mathematics of well-established applicability, such as variational methods, numerical methods, and optimization techniques, as well as papers focusing on and clarifying particular aspects of the history of mathematics and science.

Among the contributors are Graeme Milton, Geoffrey Grimmett, David Steigmann, Mario Pulvirenti and Lucio Russo.