Diamondville is a town in Lincoln County, Wyoming, United States. The population was 737 at the 2010 census.
Harrison Church discovered coal near the Hams Fork River in 1868. He gathered financial backing from a group in Minneapolis, and they formed the Hams Fork River Coal Company. Diamondville was built to house the miners, and the town was incorporated in 1896.
The town was named for the superior-grade coal that came from the local mines. The coal resembled black diamonds.
Diamondville is located at 41°46′31″N 110°32′17″W (41.775192, -110.537989).
According to the United States Census Bureau, the town has a total area of 1.17 square miles (3.03 km2), all land.
As of the census of 2010, there were 737 people, 320 households, and 203 families living in the town. The population density was 629.9 inhabitants per square mile (243.2/km2). There were 363 housing units at an average density of 310.3 per square mile (119.8/km2). The racial makeup of the town was 93.4% White, 0.1% African American, 0.7% Native American, 0.4% Asian, 0.3% Pacific Islander, 2.8% from other races, and 2.3% from two or more races. Hispanic or Latino of any race were 9.1% of the population.