Castelnuovo or Castel Nuovo (Italian for 'new castle/fortress') may refer to:
Places and jurisdictions In Italy Comuni (communes or municipalities): Castelnuovo, Trentino, Province of Trento Castelnuovo Belbo, Province of Asti Castelnuovo Berardenga, Province of Siena Castelnuovo Bocca d'Adda, Province of Lodi Castelnuovo Bormida, Province of Alessandria Castelnuovo Bozzente, Province of Como Castelnuovo Calcea, Province of Asti Castelnuovo Cilento, Province of Salerno Castelnuovo del Garda, Province of Verona Castelnuovo della Daunia, Province of Foggia Castelnuovo di Ceva, Province of Cuneo Castelnuovo di Conza, Province of Salerno Castelnuovo di Farfa, Province of Rieti Castelnuovo di Garfagnana, Province of Lucca Castelnuovo di Porto, Province of Rome Castelnuovo di Val di Cecina, Province of Pisa Castelnuovo Don Bosco, Province of Asti Castelnuovo Magra, Province of La Spezia Castelnuovo Nigra, Province of Turin Castelnuovo Parano, Province of Frosinone Castelnuovo Rangone, Province of Modena Castelnuovo Scrivia, Province of Alessandria
Frazioni (hamlets): Castelnuovo, part of Assisi, Province of Perugia, Umbria, central Italy Castelnuovo, part of Sassocorvaro Auditore, Province of Pesaro and Urbino Castelnuovo della Misericordia, part of Rosignano Marittimo, Province of Livorno Castelnuovo, part of Prato, Province of Prato Castelnuovo, part of Vergato, Province of Bologna Castelnuovo, part of Teolo, Province of Padova Castelnuovo dei Sabbioni, part of Cavriglia, Province of Arezzo
Other places and fortresses : Castelnuovo, Avezzano, medieval town forming part of the Comune of Avezzano, Province of L’Aquila, Abruzzo Castel Nuovo, a fortress in Naples Castello Nuovo, a former fortress in Brescia
Elsewhere Castelnuovo d'Istria, Italian name of Podgrad, Ilirska Bistrica, Slovenia Castelnuovo di Cattaro, often simply Castelnuovo, former name of Herceg Novi, Montenegro Kaštel Novi, Dalmatia, Croatia; Castelnuovo in Italian
Other uses Castelnuovo (surname) U.S. Castelnuovo Garfagnana, Italian football club Siege of Castelnuovo, 1539 battle between Spain and the Ottoman Empire
See also Castelnovo (disambiguation) Casalnuovo (disambiguation) Castelnuovo–de Franchis theorem