Carex vulpinoidea is a species of sedge known by the common name fox sedge or American fox-sedge. It is native to North America, including most of Canada, the Dominican Republic, the United States and parts of Mexico, and it is known in Europe and New Zealand as an introduced species. The sedge lives in wet and seasonally wet habitat, and grows easily as a roadside weed. It produces clumps of stems up to a meter tall. The inflorescence is a dense, tangled cluster of many flower spikes up to about 10 centimeters long. Tolerates fluctuating water levels and periods of drying.