Manannah Township is a township in Meeker County, Minnesota, United States. The population was 610 at the 2000 census. Most of the city of Eden Valley is located in Manannah TownshipManannah Township was organized in 1857, and named after Manannah, Minnesota.GeographyAccording to the United States Census Bureau, the township has a total area of 38.6 square miles (99.9 km²), of which 38.5 square miles (99.6 km²) is land and 0.1 square miles (0.3 km²) (0.31%) is water.Manannah Township is located in Township 121 North of the Arkansas Base Line and Range 31 West of the 5th Principal Meridian.DemographicsAs of the census of 2000, there were 610 people, 207 households, and 168 families residing in the township. The population density was 15.9 people per square mile (6.1/km²). There were 216 housing units at an average density of 5.6/sq mi (2.2/km²). The racial makeup of the township was 99.84% White and 0.16% Asian. Hispanic or Latino of any race were 0.49% of the population.There were 207 households out of which 40.1% had children under the age of 18 living with them, 70.5% were married couples living together, 4.8% had a female householder with no husband present, and 18.4% were non-families. 16.4% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.95 and the average family size was 3.27.