Temporal range: Middle Miocene
Neotherium mirum by avancna-d107vhi.jpg
A restoration of Neotherium mirum (below) along with Pelagiarctos thomasi (above)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Odobenidae
Subfamily: Imagotariinae
Genus: Neotherium
Kellogg, 1931
Species: N. mirum
Binomial name
Neotherium mirum
Kellogg, 1931

Neotherium is an extinct genus of basal walrus. It was smaller than living forms and it did not have long tusks. Males were larger than females.