Three hermit crabs, Pagurus caurinus, P. quaylei, and P. stevensae, from British Columbia are described as new. Calastacus quinqueseriatus Rathbun, Paguristes ulreyi Schmitt, Pagurus cavimanus (Miers), P. samuelis (Stimpson), Parapagurus pilosimanus Smith, Munidopsis quadrata Faxon, and Chionoecetes tanneri Rathbun have not been recorded from the area between 48° and 55°N and 123° and 135°W, and also show considerable extensions of the known ranges. Within the confines of the same area, Callianassa gigas Dana, Paguristes turgidus (Stimpson), Pagurus cornutus (Benedict), P. hemphilli (Benedict), Orthopagurus minimus (Holmes), Petrolisthes cinctipes (Randall), Sceleroplax granulata Rathbun, Pinnotheres pugettensis Holmes, P. taylori Rathbun, and Planes marinus Rathbun are reported with extensions to known ranges. Pagurus capillatus (Benedict), P. tanneri (Benedict), Paralomis verrilli (Benedict), and Lithodes couesi Benedict are recorded, apparently for the first time from British Columbia, although known from both north and south of this area.