Eureka is an unincorporated town in and the county seat of Eureka County, Nevada, United States. With a population of 610 as of the 2010 census, it is by far the largest community in Eureka County. Attractions include the Eureka Opera House, Raine’s Market and Wildlife Museum, the Jackson House Hotel, and the Eureka Sentinel Museum.Eureka is part of the Elko Micropolitan Statistical Area.