Round Valley may refer to:
United States
California Round Valley, California, a census-designated place in Inyo County, California Round Valley Indian Tribes of the Round Valley Reservation, an Indian reservation in Mendocino County, California Round Valley, a basin in Mendocino County, California, see Covelo, California Round Valley, Plumas County, California, a former settlement in Plumas County, California Round Valley (Pinto Mountain), a valley in San Bernardino County, California Round Valley Regional Preserve, in Contra Costa County, California
Other states Round Valley, Arizona, a census-designated place in Gila County, Arizona Round Valley Unified School District, in Apache County, Arizona Round Valley, Nebraska, an unincorporated community in Custer County, Nebraska Round Valley Reservoir, in Hunterdon County, New Jersey Round Valley (Millard County, Utah), a valley in Millard County and Sevier County, Utah; see Denmark Wash Other places Rural Municipality of Round Valley No. 410, Saskatchewan, Canada
Other uses
Round Valley Settler Massacres of 1856–1859, an attack on Yuki people in Mendocino County, California