Acamarachi
Acatenango
Acotango
Adwa (volcano)
Afdera (volcano)
Aguas Calientes (volcano)
Aguilera (volcano)
Akademia Nauk (volcano)
Akaigawa Caldera
Akhtang
Akita-Yakeyama
Alagogshak
Alban Hills
Ale Bagu
Alid Volcano
Almolonga
Alney-Chashakondzha
Alngey
Aluto
Amak Volcano
Amasing Hill
Ambitle
Ampato
Anaun
Antillanca Group
Antisana
Antofalla
Antuco (volcano)
Aracar
Arenal Volcano
Arintica
Arjuno-Welirang
Asahi-dake
Asavyo
Atacazo
Atlasov Island
Atna Peaks
Atsonupuri
Aucanquilcha
Avachinsky