Texas Township in Palo Alto County, Iowa, U.S. Fern Valley Township is a township in Palo Alto County, Iowa, USA.[1] References ^ U.S. Geological Survey Geographic Names Information System: Fern Valley Township, Palo Alto County, Iowa Municipalities and communities of Palo Alto County, Iowa, United StatesCounty seat: EmmetsburgCities Ayrshire Curlew Cylinder Emmetsburg Graettinger Mallard Rodman Ruthven West Bend‡ Map of Iowa highlighting Palo Alto CountyUnincorporatedcommunities Depew Fairville Osgood Footnotes‡This populated place also has portions in an adjacent county or counties Iowa portal United States portal 43°02′N 94°30′W / 43.033°N 94.500°W / 43.033; -94.500