Cyperus drummondii, commonly known as Drummond's sedge, is a species of sedge, that is native to the southern parts of North America, parts of Central America, and northern parts of South America.
Cyperus drummondii was jointly named and described by the American botanist John Torrey and the English botanist William Jackson Hooker. In an influential monograph published in 1836, Torrey acknowledged the many contributions of Hooker, which included "a set of Mr. Drummond's plants collected in Louisiana and Texas".. The acknowledgment refers to the Scottish naturalist Thomas Drummond who collected the type specimen. Torrey named the species in Drummond's honor. , the botanical name Cyperus drummondii is widely accepted.