The Rheinlander, formally known as the Rheinisches Reitpferd (Rhenish Riding Horse), represents the warmblood population bred in Germany's Rhineland region. The breed is also commonly called the Rhinelander in English and occasionally referred to as the Rhenish Warmblood. These various names all describe the same population of horses bred under the standards maintained by the regional studbook.
The breed's registry history reflects the complex structure of German warmblood breeding. Until 2014, Rheinlanders were registered with the Rheinisches Pferdestammbuch (Rhineland Horse Studbook), which managed the breed independently. Subsequently, the Hannoveraner Verband assumed management of the studbook, though the Rheinlander maintains its distinct identity within this structure. Horses bred in the Rhineland region continue to be designated Rheinlanders.
Importantly, "Rheinlander" describes a regional population rather than a strictly closed breed in the traditional sense. German warmbloods operate under open studbook policies, freely exchanging genetic material between regional populations. A horse may be registered as a Rheinlander based on where it was bred and approved, even if its parents were registered with different German warmblood associations. This system focuses on producing quality sport horses rather than maintaining distinct genetic populations.
In North America, the Rheinland-Pfalz-Saar International (RPSI) serves as the American branch of the German organization, registering Rheinlanders and related warmbloods bred in the United States and Canada. Horses registered RPSI may trace to various warmblood bloodlines but meet the standards established for Rhineland breeding.
