- Allen's Corners
- Allenwood
- Allenwood Beach
- Alliston
- Allsaw
- Alma
- Alsace
- Alsfeldt
- Alsops Beach
- Alta Vista
- Althorpe
- Altona
- Alvanley
- Alvinston
- Amaranth Station
- Ambleside
- Amherstview
- Amigo Beach
- Amulree
- Ancaster
- Anderson
- Andrewsville
- Anoma Lea
- Anson
- Ansonia
- Anstruther Lake
- Anten Mills
- Anthony
- Antrim
- Appin