Riverdale is a city located in Cook County Illinois. With a 2020 population of 12,865, it is the 188th largest city in Illinois and the 2581st largest city in the United States . Riverdale is currently declining at a rate of -0.82% annually and its population has decreased by -5.05% since the most recent census, which recorded a population of 13,549 in 2010. Riverdale reached it's highest population of 15,806 in 1970. Spanning over 4 miles, Riverdale has a population density of 3,598 people per square mile.
The average household income in Riverdale is $50,773 with a poverty rate of 26.31%. The median rental costs in recent years comes to $980 per month, and the median house value is $79,000. The median age in Riverdale is 33.6 years, 31.5 years for males, and 36 years for females.