Otaria was the name of at least two ships of the Italian Navy and may refer to:
- Italian submarine Otaria (1908), a Glauco-class submarine (1905) launched in 1905 and discarded in 1918.
- Italian submarine Otaria (1935), a Glauco-class submarine initially ordered by Portugal as Espadarte but cancelled before launch and acquired by Italy. She was launched in 1935 and discarded in 1948.
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.