| Unit Name: | Jasta 84 |
| Dates: | 1918 |
| Country: | Kingdom of Württemberg, German Empire |
| Branch: | Luftstreitkräfte |
| Type: | Fighter squadron |
| Battles: | World War I |
Royal Württemberg Jagdstaffel 84, commonly abbreviated to Jasta 84, was a "hunting group" (i.e., fighter squadron) of the Luftstreitkräfte, the air arm of the Imperial German Army during World War I.
Jasta 84 was founded on 28 or 29 October 1918. Its predecessors were Kampfeinsitzerstaffeln ("Scout Detachments") 4a and 4b. The new squadron never became operational.