Rio, IL has a population of 187 and is the 24,766th largest city in the United States. The population density is 599 per sq mi which is 170% higher than the Illinois average and 561% higher than the national average. The median age in Rio is 47 which is approximately 27% higher than the Illinois average of 37. In Rio, 73% of the population over 15 years of age are married, 92% speak English and 8% speak Spanish. 80% of Rio residents were born in Illinois, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Rio is 170% higher than Illinois.
The median age in Rio is 27% higher than Illinois.
In Rio 91.98% of the population is White.
In Rio 0.00% of the population is Black or African American.