Castelfidardo was the name of at least two ships of the Italian Navy and may refer to:
- Italian ironclad Castelfidardo, a Regina Maria Pia-class ironclad launched in 1863 and stricken in 1910
- Italian destroyer Castelfidardo, a Curtatone-class destroyer launched in 1922, seized by Germany in 1943 being renamed TA16 and sunk in 1944
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.