| Country | Country name |
| Afghanistan | conventional long form: Islamic Republic of Afghanistan conventional short form: Afghanistan local long form: Jomhuri-ye Eslami-ye Afghanestan local short form: Afghanestan former: Republic of Afghanistan |
| Akrotiri | conventional long form: Akrotiri Sovereign Base Area conventional short form: Akrotiri |
| Albania | conventional long form: Republic of Albania conventional short form: Albania local long form: Republika e Shqiperise local short form: Shqiperia former: People's Socialist Republic of Albania |
| Algeria | conventional long form: People's Democratic Republic of Algeria conventional short form: Algeria local long form: Al Jumhuriyah al Jaza'iriyah ad Dimuqratiyah ash Sha'biyah local short form: Al Jaza'ir |
| American Samoa | conventional long form: Territory of American Samoa conventional short form: American Samoa abbreviation: AS |
| Andorra | conventional long form: Principality of Andorra conventional short form: Andorra local long form: Principat d'Andorra local short form: Andorra |
| Angola | conventional long form: Republic of Angola conventional short form: Angola local long form: Republica de Angola local short form: Angola former: People's Republic of Angola |
| Anguilla | conventional long form: none conventional short form: Anguilla |
| Antarctica | conventional long form: none conventional short form: Antarctica |
| Antigua and Barbuda | conventional long form: none conventional short form: Antigua and Barbuda |
| Arctic Ocean | void |
| Argentina | conventional long form: Argentine Republic conventional short form: Argentina local long form: Republica Argentina local short form: Argentina |
| Armenia | conventional long form: Republic of Armenia conventional short form: Armenia local long form: Hayastani Hanrapetut'yun local short form: Hayastan former: Armenian Soviet Socialist Republic, Armenian Republic |
| Aruba | conventional long form: none conventional short form: Aruba |