For the valley with the same name in Nevada, see Grass Valley (Lander-Eureka counties); for other uses, see Grass Valley (disambiguation)

The Grass Valley of Pershing County, Nevada is a long valley located in the county's northeast. The north section of the valley is part of the southwest portion of Winnemucca on the Humboldt River. Clear Creek flows down the valley center, north-northwesterly and joins the Humboldt at Rose Creek, Nevada, 10-mi southwest of Winnemucca. The census-designated place of Grass Valley, with a population of 1,161, occupies the central of the valley.