Carex capillaris, the hair-like sedge, is a species of sedge found in North America and northern Eurasia including Greenland.
Carex tiogana, from northern California, is sometimes included in Carex capillaris. Two subspecies are accepted:
Carex capillaris is a known host to species of fungi, including Anthracoidea capillaris, Didymella proximella, Lophodermium caricinum and Puccinia dioicae.