Spartina, commonly known as cordgrass or cord-grass, is a genus of plants in the grass family, frequently found in coastal salt marshes.

The genus name is derived from σπαρτίνη (spartiné), the Greek word for a cord made from Spanish broom (Spartium junceum). They are native to the coasts of the Atlantic Ocean in western and southern Europe, northwest and southern Africa, the Americas and the southern Atlantic Ocean islands; one or two species also occur on the North American Pacific Ocean coast and in freshwater habitats inland in the Americas. The highest species diversity is on the east coasts of North and South America, particularly Florida.