Etna, Minnesota Greenleafton. Nearby places in Iowa include Chester and Lime Springs. Etna is located 5 miles east of Ostrander; and 4 miles west of Cherry Grove. Forestville Mystery Cave State Park is also nearby. Etna, Minnesota Etna is an unincorporated community in Bloomfield Township, Fillmore County, Minnesota, United States. Etna is located within ZIP code 55975 based in Spring Valley. A post office previously operated in the community of Etna from 1856 to 1901. The community was named for Mount Etna, on Sicily. The community is located 8 miles southeast of Spring Valley, at the junction of Fillmore County 14 and
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.