GS1 is a global organization dedicated to the design and implementation of global standards and solutions to improve the efficiency and visibility of supply and demand chains globally and across multiple sectors. The GS1 System of standards is the most widely used supply chain standards system in the world.

GS1's main activity is the development of the GS1 System, a series of standards designed to improve supply chain management. The GS1 System is composed of four key product areas: Barcodes (used to automatically identify things), eCom (electronic business messaging allowing automatic electronic transmission of data), GDSN (Global Data Synchronisation Network which allows partners to have consistent item data in their systems at the same time) and EPCglobal (which uses RFID technology to immediately track an item).

GS1 was formed when the Uniform Code Council (UCC) and the Electronic Commerce Council of Canada (ECCC) joined EAN International. UCC has become GS1 US and ECCC has become GS1 Canada.

It has headquarters in Brussels (Belgium) and Lawrenceville, New Jersey (USA). There are also Member Organisation offices in over 100 countries globally.