Johannes van Loon (c. 1611-1686), also known as Jan van Loon, was a Dutch mapmaker, mathematician, and engraver active in Amsterdam during the middle part of the 17th century. Van Loon issued the exceptional nautical atlas Klaer-Lichtende Noort-Ster ofte Zee Atlas in 1661. His is also known to have engraved several plates of Cellarius's Harmonia Macrocosmica Seu Atlas and to have contributed maps to nautical atlases and pilot books by Jacobsz, Jan Jansson, Johannes Janssonius van Waesbergen, and Robijin. Little is known of his personal life.