Nassau, Minnesota  Nassau is a city in Lac qui Parle County, Minnesota, United States. The population was 72 at the 2010 census. A post office called Nassau was established in 1888, and remained in operation until it was discontinued in 1998. Nassau was platted in 1893. According to the United States Census Bureau, the city has a total area of , all of it land. As of the census of 2010, there were 72 people, 35 households, and 19 families living in the city. The population density was . There were 42 housing units at an average density of . The racial makeup of the city was 100.0% White. There were 35 households of which 20.0% had children under the age of 18 living with them, 51.4% were married couples living together, 2.9% had a female householder with no husband present, and 45.7% were non-families. 40.0% of all households were made up of individuals and 20% had someone living alone who was 65 years of age or older. The average household size was 2.06 and the average family size was 2.79. The median age in the city was 54.2 years. 18.1% of residents were under the age of 18; 0% were between the ages of 18 and 24; 18.1% were from 25 to 44; 38.9% were from 45 to 64; and 25% were 65 years of age or older. The gender makeup of the city was 52.8% male and 47.2% female. As of the census of 2000, there were 83 people, 41 households, and 20 families living in the city. The population density was 524.8 people per square mile (200.3/km²). There were 47 housing units at an average density of 297.2 per square mile (113.4/km²). The racial makeup of the city was 95.18% White, 2.41% Native American and 2.41% Asian. Hispanic or Latino of any race were 2.41% of the population. There were 41 households out of which 22.0% had children under the age of 18 living with them, 39.0% were married couples living together, 4.9% had a female householder with no husband present, and 51.2% were non-families. 43.9% of all households were made up of individuals and 19.5% had someone living alone who was 65 years of age or older.