Blue Diamond is a census-designated place (CDP) in Clark County, Nevada, United States. The population was 290 at the 2010 census.The town includes a park, city pool, library, elementary school, event hall, church, and mercantile / gas station. The mercantile (general store) was built in 1942 and originally sold household staples and sundries to residents who were mostly miners at the Blue Diamond Mine. The store has maintained its original external look. Walls inside the store showcase many of the town's historical photos, courtesy of the Blue Diamond Historical Society, a 501c3 all-volunteer organization.HistoryBlue Diamond is the site of Cottonwood Spring (formerly known as Ojo de Cayetana, or Pearl Spring), a watering place and camp site on the Old Spanish Trail and the later Mormon Road between Mountain Springs and Las Vegas Springs. The springs are located on a mountainside south of the town at at an elevation of 3409 feet.GeographyBlue Diamond is located at (36.047090, -115.403166).DemographicsAs of the census of 2000, there were 282 people, 118 households, and 77 families residing in the CDP. The population density was 38.3 people per square mile (14.8/km²). There were 125 housing units at an average density of 17.0 per square mile (6.6/km²). The racial makeup of the CDP was 94.33% White, 0.35% Native American, 1.42% Asian, 0.35% Pacific Islander, 0.35% from other races, and 3.19% from two or more races. Hispanic or Latino of any race were 1.42% of the population.