- Lake Abitibi
- Acacoutishendaw (see Flying Post)
- Aillik
- Aklavik
- Fort Albany
- Albany House
- Fort Alexander
- Fort Alexandria
- Allanwater
- Amadjuak
- Fort Anderson
- Apsley House (see Cross Lake)
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- Arctic Bay
- Artiwinipigon (see Eastmain)
- Ash Falls
- Ashuapmuchuan
- Asp House
- Fort Assiniboine
- Lake Assiniboine
- Lake Athabaska
- Athabasca Landing
- Attawapiskat
- Lake Attawapiskat
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