LEON is a 32-bit CPU microprocessor core, based on the SPARC-V8 RISC architecture and instruction set. It was originally designed by the European Space Research and Technology Centre (ESTEC), part of the European Space Agency (ESA), and after that by Gaisler Research. It is described in synthesizable VHDL. LEON has a dual license model: An LGPL/GPL FLOSS license that can be used without licensing fee, or a proprietary license that can be purchased for integration in a proprietary product. The core is configurable through VHDL generics, and is used in system-on-a-chip (SOC) designs both in research and commercial settings.

Leon, Léon (French) or León (Spanish) may refer to:

• León, Spain, capital city of the Province of León
• Province of León, Spain
• Kingdom of León, an independent state in the Iberian Peninsula from 910 to 1230 and again from 1296 to 1301
• León (historical region), composed of the Spanish provinces León, Salamanca, and Zamora
• Viscounty of Léon, a feudal state in France during the 11th to 13th centuries
• Léon, Landes, a commune in France
• Isla de León, a Spanish island
• Leon (Souda Bay), an islet in Souda Bay, Chania, on the island of Crete