Cyperus haspan is a dwarf papyrus sedge in the Cyperaceae. It is widely distributed in tropical and subtropical regions in Africa, Madagascar, southern Asia (Iran, India, China, Philippines, Indonesia, etc.), New Guinea, Australia, South America, West Indies, Central America, southern Mexico and the southeastern United States (from Texas to Virginia).

C. haspan is found most commonly in areas with full sunlight, as it has low tolerance for shaded areas. Common habitat types for this species includes low fields, tidal marshes, broadleaf marshes, and wet prairies. It has been found to have a tolerance for low-intensity fires.