| canada | | carex bigelowii subsp. lugens | subspecies | 3 | 0 |
| canada | manitoba | carex bigelowii subsp. bigelowii | subspecies | 3 | 0 |
| canada | newfoundland and labrador | carex bigelowii | species | 1 | 0 |
| canada | northwest territories | carex bigelowii subsp. lugens | subspecies | 18 | 0 |
| canada | nunavut | carex bigelowii | species | 5 | 0 |
| canada | nunavut | carex bigelowii subsp. bigelowii | subspecies | 30 | 0 |
| canada | nunavut | carex bigelowii subsp. lugens | subspecies | 2 | 0 |
| canada | quebec | carex bigelowii | species | 3 | 0 |
| canada | quebec | carex bigelowii subsp. bigelowii | subspecies | 3 | 0 |
| canada | yukon | carex bigelowii subsp. lugens | subspecies | 7 | 0 |
| denmark | region of southern denmark | carex bigelowii subsp. bigelowii | subspecies | 2 | 0 |
| finland | | carex bigelowii | species | 1 | 0 |
| greenland | | carex bigelowii | species | 8 | 0 |
| greenland | | carex bigelowii subsp. bigelowii | subspecies | 8 | 0 |
| russia | altai krai | carex bigelowii | species | 2 | 0 |
| sweden | | carex bigelowii | species | 1 | 0 |
| united kingdom | | carex bigelowii | species | 1 | 0 |
| united states | | carex bigelowii subsp. lugens | subspecies | 3 | 0 |
| united states | alaska | carex bigelowii | species | 5 | 0 |
| united states | alaska | carex bigelowii subsp. lugens | subspecies | 2 | 0 |
| united states | new hampshire | carex bigelowii subsp. bigelowii | subspecies | 5 | 0 |