The southern bog lemming is a small rodent of moist places in eastern North America. It uses underground burrows and surface runways, and builds nests from grass and leaves.
Its back is mottled chestnut to dark brown, while the underside is silver-gray. It has a short tail and broad, grooved incisors.
It uses surface runways and shallow burrows and builds rounded nests from dry leaves and grass. It is also found in grasslands and forests, not only bogs.
An extinction-risk assessment has not been added yet.