"Mammut" borsoni (sometimes called Borson's mastodon) is an extinct species of mammutid proboscidean known from the Late Miocene to Early Pleistocene of Eurasia, spanning from western Europe to China.

[4] A fully grown specimen, suggested to be female, from Kaltensundheim, Germany had a shoulder height of 3.2 metres (10.5 ft) and an estimated body mass of 7.8 tonnes (8.6 short tons).

[10][11] In Pliocene Europe, it coexisted with other proboscidean species, including the mammoth Mammuthus rumanus and the "tetralophodont gomphothere" Anancus arvernensis, which also had browsing-based diets.

[11] Other animals that lived alongside "Mammut" borsoni in the late Pliocene of Europe include the tapir Tapirus arvernensis, the monkey Mesopithecus monspessulanus, the bovine Leptobos stenometopon, the pig Sus minor, the deer Pseudodama lyra, the rhinoceros Stephanorhinus elatus, the sabertooth cat Homotherium crenatidens, the hyenas Pliocrocuta perrieri and Chasmaporthetes lunensis, and the giant cheetah Acinonyx pardinensis.

[12] "Mammut" borsoni is known from localities across Europe, spanning from the Iberian Peninsula in the west to Ukraine and Greece in the east.