The name USS A-1 may refer to the following ships of the United States Navy:
- USS Plunger (SS-2), the lead ship of Plunger class submarine series
- USS A-1 (SP-1370), a houseboat taken over by the United States Navy in 1917
- A1 (disambiguation)#Seacraft, for other ships named A1
|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.|
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