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/