Yahagi may refer to one of the following ships of the Imperial Japanese Navy and the Japan Maritime Self-Defense Force:
- Japanese cruiser Yahagi (1911), a Chikuma-class cruiser; participated in World War I; demilitarized in 1940 and used as barracks ship Hai Kan No. 12 during World War II; scrapped in 1947
- Japanese cruiser Yahagi (1942), an Agano-class cruiser; participated in World War II; sunk by U.S. carrier-based aircraft April 7, 1945 during Operation Ten-Go
- JS Yahagi, a Mogami-class frigate
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.