Norge
Norsk Leonberger Klub
Skjærgaarden Kennel
Aldibara's Kennel
Terr-Leon's Kennel
Bukkene Bruse Kennel
Kennel Soldronningen
Son O A' Lion
Stompa & Co.
Slåttvikas Kennel
Kennel Tambos Løver

Tyskland
Tysk Leonberger Klub
Kennel v. Löwengarten
Kennel von der Geestequelle
Nathalie & Leogang 
Leonberger vom Birkenberg

Holland
Kennel Leo Amicanis

Italien
Kennel Leondomus

Diverse
International Leonberger Union
Leonberger Dogs Database 
Independent Leonberger Database
International Leonberger Database
Leo-Route
Independent Leo Gazette