USS Emerald has been the name of more than one United States Navy ship, and may refer to:
- USS Emerald (1864), a ferry boat in service from 1864 and 1883
- USS Emerald (SP-177), a patrol vessel in service from 1917 to 1918
- USS Emerald (PYc-1), a coastal minesweeper in commission from 1940 to 1942
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.