Pembina Township is a township in Mahnomen County, Minnesota in the United States. The population was 471 at the 2000 census.Pembina is a name derived from a Native American language meaning a type of cranberry.GeographyAccording to the United States Census Bureau, the township has a total area of 36.6 square miles (94.8 km²), of which 36.5 square miles (94.5 km²) of it is land and 0.1 square miles (0.3 km²) of it (0.27%) is water.DemographicsAs of the census of 2000, there were 471 people, 178 households, and 142 families residing in the township. The population density was 12.9 people per square mile (5.0/km²). There were 185 housing units at an average density of 5.1/sq mi (2.0/km²). The racial makeup of the township was 80.04% White, 7.01% Native American, 0.21% Asian, 1.27% from other races, and 11.46% from two or more races. Hispanic or Latino of any race were 2.34% of the population.There were 178 households out of which 32.6% had children under the age of 18 living with them, 73.0% were married couples living together, 3.9% had a female householder with no husband present, and 19.7% were non-families. 18.0% of all households were made up of individuals and 4.5% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 2.99.