Carex folliculata, the northern long sedge, is a species of flowering plant in the family Cyperaceae. It is native to eastern Canada (and Saint Pierre and Miquelon), and the eastern United States (but in the southeast it is confined to the Appalachians). A clumping perennial reaching but usually shorter, it has broad, yellowish-green leaves. An obligate wetland species, it is found in a wide variety of wet habitats from sea level up to , and can handle acidic, neutral, and basic conditions.