Global range
Haida Gwaii, BC (Forsyth 2004), to Trinity and Mendocino counties, California (Roth 1985, Roth and Sadeghian 2006); northern Idaho (Frest and Johannes 2001).
BC range
Haida Gwaii and northern Vancouver Island, south along the BC coast. The species also likely occurs on the mainland North Coast of BC, an area that is under-surveyed for terrestrial molluscs, especially micro-snails. Planogyra clappi should also be expected from the wet southern Interior mountains.
Ecozones
Pacific Maritime.
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