Halicarnassus may refer to:
- The boss from Final Fantasy V.
- The boss from Haukke Manor (Hard) in Final Fantasy XIV.
- The boss from Deltascape V3.0 in Final Fantasy XIV.
- The Eidolon from Final Fantasy Dimensions II.
Halicarnassus was an ancient Greek city at the site of modern Bodrum in Turkey. It was located in southwest Caria on a picturesque, advantageous site on the Ceramic Gulf. The Mausoleum at Halicarnassus was considered one of the wonders of the ancient world. It was built for the Carian King, Mausolus, thus spawning the English word "mausoleum".