Rock City, IL
Population 378 · Illinois
About Rock City, IL
Rock City is a small community in Illinois with a population of 378 residents. The median household income is $70,000 per year, which is near the national average. The median age in Rock City is 32.2 years.
Housing in Rock City has a median home value of $124,000 and median monthly rent of $845. Of the 134 total housing units, the majority are owner-occupied, with 103 owner-occupied and 27 renter-occupied units.
The unemployment rate in Rock City is 3.7% and the poverty rate is 4.5%. 12.9% of residents hold a bachelor's degree or higher. The average commute time is 30.4 minutes.
Cost of Living in Rock City, IL
Compared to national averages, Rock City has a median household income of $70,000 (7% below the national median of $75,149). Home values average $124,000, which is 49% below the national median. Monthly rent at $845 is 27% below the US average of $1,163. Within Illinois, Rock City's income is 7% below the state average of $75,072, and home values are 25% below the state median of $165,779.
Why Live in Rock City, IL?
Rock City offers affordable housing with a median home value of $124,000, below the US average of $244,900, and rent that’s lower than the national average at $845/month, and a low poverty rate of 4.5%, better than the national average.
Potential considerations include median household income ($70,000) that falls below the national average. However, Rock City’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Rock City has a population of 378 with a median age of 32.2 years. Compare Rock City with other cities to see how it stacks up, or explore all cities in Illinois.
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Other Cities in Illinois
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Rock City
What is the population of Rock City, IL?
The population of Rock City, IL is 378 according to the latest Census data.
What is the median household income in Rock City?
The median household income in Rock City, IL is $70,000 per year.
What is the median home value in Rock City?
The median home value in Rock City, IL is $124,000.
What is the average rent in Rock City?
The median monthly rent in Rock City, IL is $845.
What is the unemployment rate in Rock City?
The unemployment rate in Rock City, IL is 3.7%.