Kronokotherium is an extinct herbivorous marine mammal of the family Desmostylidae in the order Desmostylia.
Its type locality is Raktinskaya, Kamchatka Peninsula, Russia (, paleocoordinates ).
Kronokotherium was made a separate genus because the specimen differs from Desmostylus in the arrangement of the major molar cusps and its smaller size, but it has been synonymized with Desmostylus by most authors.