Parc du Plessis-Tison, Public park in Nantes, France.

Parc du Plessis-Tison is a public park in Nantes with walking paths, play areas for children, and seating scattered throughout the grounds. The space features zones for activity and relaxation, arranged to accommodate different ways people want to spend time outdoors.

The château and estate of Plessis-Tison belonged to the de La Tullaye family until 1929, when Marquis René de La Tullaye completed the break-up of the property. The city bought part of the estate in 1926 and laid out the park, which was gradually fitted out during the 1930s. The château itself was sold to the Ursuline sisters of Nantes for the Blanche-de-Castille school.

The name Plessis-Tison comes from the estate of the La Tullaye family, who kept the land until 1929; the marquis René de La Tullaye then sold the château to the Ursuline sisters of Nantes for the Blanche-de-Castille school. The park keeps a pataugeoire (paddling pool) on the site of an older water feature shown on old plans, and many oak species grow among the lawns and paths.

The main entrance is at the rond-point de Paris, at the corner of boulevard Jules-Verne to the east and boulevard des Belges to the south; the park is bounded west by rue de Racapé and adjoins the lycée Blanche-de-Castille to the north. High walls line the boulevards, so the entrances are the way in. Inside, gravel and dirt paths lead under the trees to the lawn, benches and paddling pool.

The mound in the park was raised in the 1870s from earth dug out when the neighbouring pond was excavated; that pond lay on the site now occupied by the lycée Blanche-de-Castille. The park's pataugeoire (paddling pool) likewise recalls an older water feature shown on former plans.