Valles may refer to:

• the plural of Vallis, a Latin word for "valley" used in naming topographical features on other planets
• Interandean Valles, the region of valleys that is home to most of the human population and agricultural production of the central Andes of Peru, Bolivia, and northwest Argentina
• Vallès, a region in Catalonia, Spain, comprising the comarques of Vallès Occidental and Vallès Oriental
• Vallés, Valencia, a town in the Valencian Community, Spain
• Jules Vallès (1832-1885), French writer and political activist
• Arlington Valles (1886-1970), Oscar-winning costume designer
• Mario Valles (born 1977), Colombian judoka
• Max Valles, American football player
• Valles Caldera, New Mexico

El Vallès (or simply Vallès) is a historical county in Catalonia, Spain, located in the center of the Catalan Pre-coastal range. It is nowadays represented by two separate administrative divisions which are part of the Barcelona Province, named comarca (plural: comarques). One of them is the Western Vallès, which has two capitals, Sabadell and Terrassa, whereas the second comarca is the Eastern Vallès, with Granollers as its capital.