Walnut Township, Fremont County, IowaWalnut Township is one of thirteen townships in Fremont County, Iowa, United States. As of the 2010 census, its population was 145 and it contained 66 housing units.GeographyAs of the 2010 census, Walnut Township covered an area of, all land.Transportation Iowa Highway 2School districts Farragut Community School District Shenandoah Community School DistrictPolitical districts Iowa's 3rd congressional district State House District 23 State Senate District 12