Elk-sedge or elk sedge may refer to:
Algiz or Eolh-secg (elk-sedge), a rune of the Elder Futhark and Futhorc runic alphabets
Plants Carex garberi, a species of sedge native to northern North America. Carex geyeri, a species of sedge native to western North America from British Columbia to California to Colorado Cladium mariscus, a species of flowering plant in the sedge family native to temperate Europe and Asia