Verband der Zuechter des Oldenburger Pferdes e. V.
- Breed information, auction schedules, sales lists, and a stallion directory. Based in Germany. Web site in English and German.
- http://www.oldenburger-pferde.com/

Oldenburg Horse Breeders Society
- North American division of the Verband. Directory providing information on the breed, auctions, inspections, stallions, and sales.
- http://www.oldenburghorse.com/