'Inn' was a U-boat wolfpack operation in the Atlantic, in tandem with 'Isar', against the ONS.7 convoy (11/15 May 1943).

The wolfpack comprised U-92, U-258, U-381 and U-954, and neither lost any of its own number nor sank any ship. On 15 May these two wolfpacks and the 'Nahe' wolfpack were combined to create the two 'Donau' wolfpacks.