Marsh Creek Township is a township in Mahnomen County, Minnesota, United States. The population was 128 at the 2000 census.This township was named for Marsh Creek.GeographyAccording to the United States Census Bureau, the township has a total area of 37.7 square miles (97.5 km²), of which 37.7 square miles (97.5 km²) of it is land and 0.03% is water.DemographicsAs of the census of 2000, there were 128 people, 45 households, and 31 families residing in the township. The population density was 3.4 people per square mile (1.3/km²). There were 46 housing units at an average density of 1.2/sq mi (0.5/km²). The racial makeup of the township was 85.16% White, none Black or African American, 7.03% Native American, none Asian, none Pacific Islander, 1.56% from other races, and 6.25% from two or more races. Hispanic or Latino of any race were 1.56% of the population.There were 45 households out of which 37.8% had children under the age of 18 living with them, 62.2% were married couples living together, 6.7% had a female householder with no husband present, and 28.9% were non-families. 22.2% of all households were made up of individuals and 17.8% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.41.