Khadjibey (Turkish: Hacıbey) was a fortress and a haven by the Gulf of Odessa, in the location of the modern city of Odessa, Ukraine. Other known spellings include Khadzhibey, Khadjibei, Hajibey, Khacdjibei, Hacıbey, Hocabey, Gadzhibei, Chadžibėjus, Hacıbey, Codjabey.
The settlement existed at least since 14th century, abandoned in 15th or 16th century, and restored by the Ottoman Empire as a fortress in 18th century, included in Silistra Eyalet. Named after Hacı I Giray.