The Order of the Gold Lion of the House of Nassau (French: Ordre du Lion d'Or de la Maison de Nassau, Dutch: (Huis)orde van de Gouden Leeuw van Nassau) is a chivalric order shared by the two branches (the Ottonian and Walram lines) of the House of Nassau.
In the capacity of the Walram line the Order of the Gold Lion of the House of Nassau is the highest Luxembourgian national order, bestowed by the Grand Duke of Luxembourg. It may be awarded on foreign sovereigns, princes of sovereign houses, and heads of state for meritous service to Luxembourg and the Grand Duke.