巨松鼠属（巨松鼠），哺乳纲、囓齿目、松鼠科的一属，而与巨松鼠属（巨松鼠）同科的动物尚有婆罗洲地鼠属（婆罗洲地鼠）、鼩吻松鼠属（鼩吻松鼠）、非洲巨松鼠属（非洲巨松鼠）、西里伯斯松鼠属（西里伯斯松鼠）等之数种哺乳动物。

Oriental giant squirrels are cat-sized tree squirrels from the genus Ratufa in the subfamily Ratufinae. They are a distinctive element of the fauna of south and southeast Asia.

There are four living species of oriental giant squirrels:

In prehistoric times this lineage was more widespread. For example, animals very similar to Ratufa and possibly belonging to this genus–at least belonging to the Ratufinae–were part of the early Langhian (Middle Miocene, some 16–15.2 million years ago) Hambach fauna of Germany.