Etna, California . Etna, California Etna is a city in the Scott Valley area of Siskiyou County, California, United States. The population was 737 at the 2010 census, down from 781 at the 2000 census. Originally named Rough and Ready, it was changed by statute in 1874 to Etna after the local flour mill (spelled Ætna/Aetna after Mount Ætna in Sicily). Etna is located at (41.457350, -122.896875). Etna is in Northern California near the Oregon border, located in Scott Valley near the CDP of Greenview, the city of Fort Jones, and the unincorporated community of Callahan. Etna is located at the foot
Etna, Wyoming Etna, Wyoming Etna is a census-designated place (CDP) in Lincoln County, Wyoming, United States. The population was 164 at the 2010 census. Etna is located at (43.031124, -111.016042). in Star Valley, a grassland valley surrounded by forested mountains. According to the United States Census Bureau, the CDP has a total area of 2.0 square miles (5.1 km²), all of it land. As of the census of 2000, there were 123 people, 44 households, and 34 families residing in the CDP. The population density was 62.8 people per square mile (24.2/km²). There were 55 housing units at an average density of