'''Couch grass''', as a vernacular common name, may refer to:
* ''Cynodon dactylon'', known as couch grass in Australia and South Africa, often planted as a turf grass * ''Elymus repens'', known as couch grass in the United Kingdom and North America, often considered to be a weed * ''Sporobolus virginicus'', a perennial grass native to the southeastern United States that is often used as a lawn grass in warmer climates. * ''Paspalum vaginatum'', a perennial grass native to coastal areas in the Americas that is often used as a turf grass in salt-tolerant landscapes.
{{Plant common name}}