A9, A.9, A09, A 9 or A-9 may refer to.
The Airco DH.9A was a British single-engined light bomber designed and first used shortly before the end of the First World War.
Gemini 9A (officially Gemini IX-A) With Gemini IV, NASA changed to Roman numerals for Gemini mission designations.
Route 9A can refer to the following highways.
Nine-a-side football is a sport based on Australian rules football played informally by Aussie rules clubs but not yet an official sport in its own right.
The 9A-91 is a carbine assault rifle currently in use with Russian police forces.