- McLennan's Beach
- McMurchy Settlement
- McMurrich
- McNaughton Shore
- McReynolds
- McRoberts Corner
- McVicar
- Meaford
- Mechanicsville
- Medina
- Medonte
- Melancthon
- Melrose
- Melrose
- Mennonite Corner
- Menoke Beach
- Merivale
- Merivale Gardens
- Merrickville-Wolford
- Mertz's Corner
- Metcalfe
- Metropolitan
- Metropolitan Area Apt
- Metz
- Michael's Bay
- Micksburg
- Middlemarch
- Middlemiss
- Midhurst
- Midhurst Station