Josua de Grave, was a Dutch Golden Age draughtsman and painter.

De Grave is best known for his topographical drawings of the Southern Netherlands, including Maastricht and some in France during the years 1667-1668, among which drawings of the military camps of Stadholder William III during the campaigns against the French in 1674-1676. He later refocussed on imaginary and Italianate landscapes, often with a strong accent on perspective. He became a member of the Haarlem Guild of St. Luke in 1659. His relationship to Timotheus de Graaf (1647-1724), a teacher of Jacob Appel has not been established. He drew mostly in black or brown pen with grey wash. A few paintings of his, mostly with imaginary landscapes, are also known.