18A (disambiguation)
# 18A (disambiguation)

The 18A was a 2013 Argentine protest demonstration.

18A, 18-A, 18a or XVIII-A may also refer to:

* Air & Space 18A, a 1965 United States gyroplane
* Highway 18A (Ontario)
* Nevada State Route 18A
* Soyuz 18a, a 1975 Soviet spacecraft mission
* Stalag XVIII-A, a German prisoner of war camp
* Volkswagen Type 18A, a 1949 special version made for the German police
