Superior is a city in Dickinson County, Iowa, United States. The population was 130 at the 2010 census.
Superior began its historic existence in 1882 when the railroad was built through the neighborhood.
Superior is located at 43°25′56″N 94°56′44″W (43.432156, -94.945692).
According to the United States Census Bureau, the city has a total area of 0.41 square miles (1.06 km2), all land.
As of the census of 2010, there were 130 people, 52 households, and 34 families living in the city. The population density was 317.1 inhabitants per square mile (122.4/km2). There were 60 housing units at an average density of 146.3 per square mile (56.5/km2). The racial makeup of the city was 99.2% White and 0.8% from two or more races. Hispanic or Latino of any race were 1.5% of the population.
There were 52 households of which 26.9% had children under the age of 18 living with them, 50.0% were married couples living together, 7.7% had a female householder with no husband present, 7.7% had a male householder with no wife present, and 34.6% were non-families. 28.8% of all households were made up of individuals and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 2.97.