USS Emma has been the name of more than one United States Navy ship, and may refer to:
- USS Emma (1863), a screw steamer, captured on 24 July 1863 and sold 1 November 1865
- USS Emma (SP-1223), a patrol boat in noncommissioned service from 1917 to 1918
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.