- Source: USS Sea Otter
USS Sea Otter may refer to various United States Navy ships:
USS Sea Otter (SP-781), a patrol vessel in commission from 1917 to 1919;
USS Sea Otter I (IX-51), an experimental auxiliary ship in commission from July to November 1941; and
USS Sea Otter II (IX-53), an experimental auxiliary ship in commission from 1941 to 1942.