| Quart | |
| Official Name: | Comune di Quart Commune de Quart |
| Coordinates: | 45.7333°N 32°W |
| Province: | none |
| Frazioni: | Argnod, Éclou, L'Amérique, Les Cleyves, Trois-Villes, La Montagne, Villair de Quart, Villefranche, Ville-sur-Nus, Villeneuve, Champlan, Larey, Avisod, Bagnère, Chantignan, Chétoz, La Combe, Cort, Crétallaz, Créton, Effraz, Jeanceyaz, Morgonaz, Olleyes, Porsan, Seran, Teppe, Lillaz, Vignil, Povil, Vollein |
| Mayor: | Giovanni Barocco |
| Area Total Km2: | 62 |
| Population Footnotes: | [1] |
| Population Total: | 4104 |
| Population As Of: | 31 December 2022 |
| Population Demonym: | Quarteins |
| Elevation M: | 535 |
| Saint: | St. Helena |
| Day: | 2 August |
| Postal Code: | 11020 |
| Area Code: | 0165 |
| Istat: | 7054 |
Quart (Valdôtain: Car; Issime Koart) is a comune (municipality) in the Italian region of Aosta Valley.
The Quart Castle, built starting from 1185 by Jacques de la Porte de Saint-Ours, founder of the Lords of Quart.
On the slopes below the castle, near Vollein, in 1968 remains of the Neolithic Vollein necropolis were found.
Other sights include a series of medieval watchtowers, such as the Chétoz Tower, the museum of Aosta Valley Railroads, and a fortified house in Povil.