A
- Hardo Aasmäe (Estonia, born 1951)
- Aziz Ab'Saber (Brazil, born 1924)
- Diogo Abreu (Portugal, born 1947)
- Peter Adams (Canada, born 1936)
- Agatharchides (Ancient Greece, 2nd century BC)
- Agathedaemon of Alexandria (Ancient Greece, 2nd century AD)
- John A. Agnew
- A. W. Andrews (UK, 1868–1959))
- Alypius of Antioch (Roman Empire, fl. circa 450)
- Ash Amin (UK)
- Jacques Ancel (France, 1879–1943)
- Karl Andree (Germany, 1808–1875)
- Richard Andree (Germany, 1835–1912)
- Aaron Arrowsmith (England, 1750–1823)
- Väinö Auer (Finland, 1895–1981)
- Félix de Azara (Spain, 1742–1821)
Read more about this topic: List Of Geographers