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, Maine Etna, Maine Etna is a town in Penobscot County, Maine, United States. The population was 1,246 at the 2010 census. Etna is named for the famed Mount Etna in Italy. It was originally known as "Crosbytown" after its first proprietor, Gen. John Crosby of Hampden. Etna was incorporated as a town in 1820. Circa 1850 it had a population of 802. Camp Etna is a summer colony where spiritualists have held yearly meetings since 1876, when Daniel Buswell, Jr., held the first meeting in a tent. A temple seating 1,100, a club house, and 78 cottages were built in 1880.