Jacques Wirtz (31 December 1924 – 21 July 2018) was a Belgian landscape architect.
He believed that his gardens should preserve and enhance the spirit of place, rather than stamping his own mark on the landscape.
He came to public notice after being commissioned to design the garden for the Belgian pavilion at Expo '70 in Osaka.
President Mitterrand also asked him to redesign the gardens at the Élysée Palace (1992).
He received the Golden Medal of the Royal Flemish Academy of Belgium for Science and the Arts in 2006, when he was compared with André Le Nôtre, William Kent, and Lancelot “Capability” Brown.