Etna is an unincorporated town in Etna-Troy Township, Whitley County, in the U.S. state of Indiana. History Etna was platted in 1849. The community was named after Etna, Ohio, the native home of a first settler. A post office was established at Etna in 1851. The name of the post office was changed to Hecla in 1861, and operated under this name until 1904. Geography Etna is located at . References Unincorporated communities in Whitley County, Indiana Unincorporated communities in Indiana Fort Wayne, IN Metropolitan Statistical Area