This list includes 4 Dog breeds that start with O, from “Old English Sheepdog” to “Otterhound”. These breeds show varied looks and sizes, from large, shaggy herders to robust scent hounds. People commonly keep them as family companions, working dogs, or hunting partners.
Dog breeds that start with O are established breeds whose names begin with the letter O. Many have strong regional histories, like the Otterhound’s use in British otter hunting and waterways.
Below you’ll find the table with origin, size category, and temperament.
Origin: Shows each breed’s country or region of origin, so you can judge historical traits and care needs.
Size category: Gives a quick class (toy, small, medium, large, giant) so you can gauge space and exercise needs.
Temperament: Lists two to four concise traits to help you predict compatibility and typical behavior in the home.
Dog breeds that start with O
| Name | Scientific name | Origin | Size |
|---|---|---|---|
| Old English Sheepdog | Canis lupus familiaris | England | Large 25–45 kg / 55–99 lb |
| Otterhound | Canis lupus familiaris | England | Large 30–45 kg / 66–99 lb |
| Olde English Bulldogge | Canis lupus familiaris | United States | Medium 25–40 kg / 55–88 lb |
| Old German Shepherd Dog | Canis lupus familiaris | Germany | Large 30–40 kg / 66–88 lb |