旅鼠属（Lemmus），哺乳纲、囓齿目、仓鼠科的一属，而与旅鼠属（泽河旅鼠）同科的动物尚有田鼠属（黑田鼠）、黑足旅鼠属（黑足旅鼠）、灌丛田鼠属（灌丛田鼠）、松田鼠属（橙色松田鼠）等之数种哺乳动物。

The genus Lemmus contains several species of lemming sometimes referred to as the true lemmings. They are distributed throughout the Holarctic, particularly in the Palearctic.