The Altwürttemberger (German : Alt-Württemberger, meaning "old wurtemberg") is a horse breed from Baden-Württemberg, Germany.

The altwürttemberger is a solid, heavy cob and warmblood horse, suitable for both saddling and pulling.

Due to its very low numbers, between 50 and 60 individuals in the 2010s, it is considered a rare breed in critical danger of extinction.

[3] The livestock was dispersed during the Thirty Years' War, and breeding did not resume in earnest until the early 18th century.

[3] Crossbreeding of native mares continued with Arabian, Barb, East Frisian, Turkish, Hungarian, Caucasian and Suffolk stallions.

[6] The Anglo-Norman stallion Faust, born in Normandy in 1885[6] or 1886,[5] became the founder of the breed, which was subsequently established through inbreeding.

[7][5] Until the 1960s, breeding was concentrated in the Württemberg Oberland and Hohenzollern, but also in the regions around Ludwigsburg, Leonberg, Herrenberg, Esslingen and Göppingen.

[7] The breed declined with the motorization of farming activities, and due to the popularity of the sport horse, from the 1950s and 1960s onwards.

[12] It is a cob-type[1][3][7] horse, belonging to the "heavy warmblood" category of older half-blood breeds, of which lighter, more recent models exist.

[4] Medium-sized,[6] according to the German breed association[7] and the Delachaux guide,[1] their height ranges from 1.55 m to 1.65 m. The average height recorded for females in the DAD-IS database is 1.60 m.[12] Stallions must measure less than 1.70 m. Bonnie Lou Hendricks' encyclopedia (University of Oklahoma, 2007) gives an average of 1.65 m.[3] The head is lean, moderately heavy, with a sufficiently expressive eye,[7] of straight profile with good width between the eyes,[3] of medium length, rather square, with straight ears.

[11][12] The breed association promotes its use as a leisure and family horse, as well as for equine-assisted therapy and show jumping.

[13] DAD-IS lists the Altwürttemberger as a rare local German breed;[12] more precisely, it is indigenous to the south of the country.

[15][16] To mark the occasion, the breed was presented at the International Green Week in Berlin, January 19 to 28, 2018.