- Oiseau-tonnerre
- Oiseaux aquatiques (Sauvagine)
- Oiseaux de proie
- Oiseaux marins
- Ojibwés
- Oka
- Oka Crisis (Résistance à Kanesatake)
- Okill Stuart (Source primaire)
- Oklahoma City Bombing (en anglais seulement)
- Oklahoma City Bombing Verdict
- Oklahoma City Bombing: Canadian Link?
- Okotoks
- Olav Slaymaker
- Old Crow
- Old Crow, plaine
- Old Friends Ignatieff, Rae to Pursue Liberal Leadership
- Old Log Church, musée
- Olds
- Oldsmobile
- Olestra Controversy
