Juan José Elhuyar Lubize (15 June 1754 – 20 September 1796) is a Spanish chemist and mineralogist, the joint discoverer of tungsten with his brother Fausto Elhuyar in 1783.

He was born in Logroño, son of French-Basque parents from Hasparren (Labourd).

He died in Santafé de Bogotá, Colombia (Kingdom of Spain, until the arrival of Simon Bolivar).