The name USS K-3 may refer to the following ships of the United States Navy:
- USS K-3 (SS-34), a K-class submarine, originally named Orca
- USS K-3 (SSK-3), a Barracuda-class submarine, later renamed Bonita
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.