Crescent Valley is a census-designated place (CDP) in Eureka County, Nevada, United States, directly off Nevada State Route 306. It is the site of Crescent Valley Elementary School, Crescent Valley Fair Grounds, and Crescent Valley Community Park. The census-designated place (CDP) of Crescent Valley had a population of 483 as of the 2020 census.

Eureka County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 1,855, making it the second-least populous county in Nevada. Its county seat is Eureka.