Henri Justel (1619–1693) was a French scholar and royal administrator, and also a bibliophile and librarian. He is known also as Henry Justel and Henricus Justellus. He was son of the scholar Christophe Justel. He acted as a secretary to Louis XIV. A Huguenot, he left France in 1681, just ahead of the revocation of the Edict of Nantes, aware in advance of its implications for him. He emigrated to England, where he became a royal librarian at St. James's Palace, continuing to serve under William III.