Riverdale is a village and a south suburb of Chicago in Cook County, Illinois, United States. The population was 13,549 at the 2010 census. The village shares its name with the bordering Riverdale neighborhood in Chicago.
Riverdale is located at 41°38′26″N 87°37′50″W (41.640684, -87.630645).
According to the 2010 census, Riverdale has a total area of 3.745 square miles (9.70 km2), of which 3.57 square miles (9.25 km2) (or 95.33%) is land and 0.175 square miles (0.45 km2) (or 4.67%) is water.
As of the 2010 census, there were 13,549 people, 4,595 households, and 3,204 families residing in the village. The racial makeup of the village was 4.9% White, 94.0% African American, 0.5% Native American, 0.3% Asian, 0.1% Pacific Islander, 0.7% from other races, and 0.2% from two or more races. Hispanic or Latino of any race were 1.7% of the population.
There were 4,595 households out of which 36.1% had children under the age of 18 living with them, 24.8% were married couples living together, 37.4% had a female householder with no husband present, 7.5% had a male householder with no wife present, and 30.3% were non-families. 25.7% of all households were made up of individuals and 2.2% had someone living alone who was 65 years of age or older. The average household size was 2.92 and the average family size was 3.50.
In the village, the population was spread out with 41.8% at the age 16 and over, 39.6% at the age 18 and over, 36.6% at the age 21 and over, 5.7% at the age of 62 and older, and 4.3% who were 65 years of age or older.