A
- Abénakis
- Abasand Heights
- Abbot Heights
- Abbotsford
- Aberarder
- Abercorn
- Abercrombie
- Aberdeen
- Aberfoyle
- Aberfoyle Creek Estates
- Abingdon
- Acton
- Acton Vale
- Adamsville
- Adderley
- Adstock
- Agassiz
- Agerton
- Aikensville
- Aikwucks 15
- Ailsa Craig
- Airlie
- Aitchelitch 9
- Ajax
- Akwesasne
- Akwesasne 59
- Akwesasne Reserve No. 15
- Albanel
- Albatross
- Albert
- Albion
- Albury
- Alcona
- Alder
- Aldergrove
- Aldershot
- Alderslea
- Alderville
- Aldred's Beach
- Alencon
- Alexis 9
- Algonquin Highlands
- Allanburg
- Allen's Mill
- Allens Corners
- Allenwood
- Alleyn-et-Cawood
- Allimil
- Allimill
- Allison Bay 219
- Allisonville
- Alliston
- Alloa
- Alma
- Alma
- Almira
- Alsops Beach
- Alton
- Altona
- Ambuoy
- Ameliasburg
- Amherst
- Amherstburg
- Amherst Pointe
- Amherstview
- Amos
- Amulree
- Ancaster
- Ange-Gardien
- Angliers
- Angus
- Anjou
- Anmore
- Annable Settlement
- Ansnorveldt
- Anten Mills
- Antioch
- Applecroft
- Appledore
- Apple Hill
- Apto
- Archer
- Ariss
- Arkell
- Arkwood
- Armagh
- Armagh Station
- Armow
- Armstrong
- Armstrong Mills
- Arntfield
- Arthurville
- Arundel
- Arva
- Arvida
- Asbestos
- Ascot
- Ascot Corner
- Ash
- Ashburn
- Ashgrove
- Asimakaniseekan Askiy I.R. 102A
- Asphodel-Norwood
- Asselstine
- Assumption
- Aston-Jonction
- Astorville
- Atha Road
- Aubert-Gallion
- Aubut
- Auclair
- Auden Park
- Audet
- Audley
- Aumond
- Aurora
- Austin
- Austin
- Authier
- Authier-Nord
- Avon
- Avondale
- Avonmore
- Avonry
- Ayer's Cliff
- Aylechootlook 5
- Aylesworth
- Aylmer
- Aylmer
- Ayr
- Aywawwis 15
- Azilda
