Castelnau may refer to:
Places
France Castelnau or Castelnaud (castel 'castle' and nau 'new' in Occitan) is part of the name of several communes in the south of France:
Castelnau-Barbarens, in the Gers département Castelnau-Chalosse, in the Landes département Castelnau-d'Anglès, in the Gers département Castelnau-d'Arbieu, in the Gers département Castelnau-d'Aude, in the Aude département Castelnau-d'Auzan, in the Gers département Castelnau-d'Estrétefonds, in the Haute-Garonne département Castelnau-de-Brassac, in the Tarn département Castelnau-de-Guers, in the Hérault département Castelnau-de-Lévis, in the Tarn département Castelnau-de-Mandailles, in the Aveyron département Castelnau-de-Médoc, in the Gironde département Castelnau-de-Montmiral, in the Tarn département Castelnau-Durban, in the Ariège département Castelnau-le-Lez, in the Hérault département Castelnau-Magnoac, in the Hautes-Pyrénées département Castelnau-Montratier, commune in the Lot département Castelnau-Montratier (delegated commune), delegated commune in the Lot département Castelnau-Pégayrols, in the Aveyron département Castelnau-Picampeau, in the Haute-Garonne département Castelnau-Rivière-Basse, in the Hautes-Pyrénées département Castelnau-sur-Gupie, in the Lot-et-Garonne département Castelnau-sur-l'Auvignon, in the Gers département Castelnau-Tursan, in the Landes département Castelnau-Valence, in the Gard département Castelnaud-de-Gratecambe, in the Lot-et-Garonne département Castelnaud-la-Chapelle, in the Dordogne département Saint-Michel-de-Castelnau, in the Gironde département
England Castelnau, London, an estate and road in Barnes, south-west London
Canada De Castelnau station, a Montreal Metro station in the Villeray–Saint-Michel–Parc-Extension borough Castelnau Lake, a freshwater body of the catchment area of the rivière à la Chasse in Baie-Comeau, Quebec
People Michel de Castelnau, sieur de la Mauvissière (c. 1520–1592), French diplomat and soldier Emmanuel Boileau de Castelnau (1857-1923), French mountain climber François-Louis Laporte, comte de Castelnau (1810–1880), French naturalist Noël Édouard, vicomte de Curières de Castelnau (1851–1944), French general
See also Château de Castelnau-Bretenoux, a castle in the commune of Prudhomat, Lot département, France Châteauneuf (disambiguation) Neufchâtel (disambiguation) Neuchâtel Newcastle (disambiguation) Neuburg (disambiguation)