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 of
Etna, New Hampshire Etna, New Hampshire Etna, originally named "Mill Village", is a small unincorporated community within the town of Hanover, New Hampshire, in the United States. It is located in southwestern Grafton County, approximately east of Hanover's downtown and south of the village of Hanover Center, on Mink Brook. Etna has a separate ZIP code 03750 from the rest of Hanover, as well as its own fire station, church, and library. The population within Etna's ZIP Code area was 870 at the 2010 census. Etna does not have a downtown or sidewalks, but commerce revolves around the Etna General Store and the