Castellammare
Castellammare or Castello a Mare (Castle by the Sea) stands for
- Castellammare Adriatico, a formerly independent town in Abruzzo, which was incorporated into Pescara in 1927
- Castellammare del Golfo , a municipality in the province of Trapani in Sicily
- Castellammare di Stabia , a municipality in the Province of Naples in Campania
- Castello a Mare , a castle on the port of Palermo
- the Castellammare War , a bloody conflict between the Italian-American gangs of the Cosa Nostra