The Château de Lacoste is a ruined castle in the commune of Salviac in the Lot département of France.
It consists of three corps de logis grouped around a courtyard; a more recent building has grown along the park.
In the 18th century, a large perron was constructed at the length of the courtyard façade of the western logis.
A second perron, now dismantled, gave access from the park to the southern buildings.
Inside, rooms have kept their 17th-century woodwork, with plafonds à la française (French-style ceilings: joists the same width as the spaces between them; see Plafond à la française in French Wikipedia).