[2][3] The Oregon slender salamander is endemic to north-central Oregon, found particularly on the western slopes of the Cascade Range but also in some sites on the eastern slopes.

[5] The species' natural habitats are temperate forests of moist Douglas fir, maple, and red cedar woodlands in Oregon, to 910 metres (3,000 ft).

[1] They are typically found in old growth habitat, associated with late-successional Douglas fir forests.

However they have been found in earlier succession forest with larger logs and much downed woody debris.

[3] When found this species will coil its body up and remain motionless.