- Aeolia (Aeolis)
- Anhwei (Anhui)
- Aachen
- Aargau
- Aceh
- Achaia
- Açores (Azores)
- Aeolis (Aeolia)
- Aetolian League
- Afghanistan
- Ahlen
- Aibling
- Akragas
- Aksum
- Albania
- Alderney
- Algeria
- Altena-Olpe
- Amiens
- Andorra
- Angola
- Anguilla
- Anhalt
- Anhalt-Bernburg
- Anhalt-Dessau
- Anhalt-Kothen
- Anhalt-Zerbst
- Anhui (Anhwei)
- Annam
- Antigua and Barbuda
- Antwerp
- Apolda
- Appenzell
- Arches-Charleville
- Argentina
- Armavir
- Armenia (Hajastan)
- Arnhem
- Arnsberg
- Artois
- Aruba
- Ascension Island
- Aschaffenburg
- Augsburg
- Australia
- Austria
- Austria Netherlands
- Avignon
- Azerbaijan
- Azores (Açores)
- SADR (Sahrawi Arab Democratic Republic)