Microtus pennsylvanicus (Ord, 1815)
General Characteristics
| Subspecies | Type Locality |
| Microtus pennsylvanicus admiraltiae Heller | Windfall Harbor, Admiralty Island |
| Microtus pennsylvanicus alcorni Baker | |
| Microtus pennsylvanicus rubidus Dale | |
| Microtus pennsylvanicus tananaensis Baker | Yerrick Creek, 21 mi. W, 4 mi. N Tok Junction |