Wadena is a city in Fayette County, Iowa, United States. The population was 262 at the 2010 census.Wadena's electricity is supplied by Alliant Energy. Its land-line phone and DSL internet service is provided by Windstream. Cellular phone service is mainly provided by U.S. Cellular as they have a tower located just east of town. Wadena is located in a valley and other cellular phone providers have spotty coverage in town. Wadena no longer has a cable television provider. Any cable television services must be obtained through satellite service providers such as Dish Network or DirecTV.Wadena is remembered in Iowa for the Woodstock-like rock festival held on a nearby farm, August 1–3, 1970. It also held a second rock-fest in late July 1995.Wadena is also known for its lighted cross which is located on the hill south of town. The cross overlooks Wadena and was erected during the bi-centennial celebrations in 1976. The lighted cross is maintained entirely by donations.