Rochester, IL
Population 3,784 · Illinois
About Rochester, IL
Rochester is a small community in Illinois with a population of 3,784 residents. The median household income is $112,689 per year, which is above the national average. The median age in Rochester is 39.2 years.
Housing in Rochester has a median home value of $241,900 and median monthly rent of $1,333. Of the 1,447 total housing units, the majority are owner-occupied, with 1,327 owner-occupied and 56 renter-occupied units.
The unemployment rate in Rochester is 3.6% and the poverty rate is 2.1%. 49.9% of residents hold a bachelor's degree or higher. The average commute time is 18.7 minutes.
Cost of Living in Rochester, IL
Compared to national averages, Rochester has a median household income of $112,689 (50% above the national median of $75,149). Home values average $241,900, which is 1% below the national median. Monthly rent at $1,333 is 15% above the US average of $1,163. Within Illinois, Rochester's income is 50% above the state average of $75,072, and home values are 46% above the state median of $165,779.
Why Live in Rochester, IL?
Rochester offers a strong local economy with a median household income of $112,689, well above the national average, and affordable housing with a median home value of $241,900, below the US average of $244,900, and a strong job market with an unemployment rate of just 3.6%. Additionally, the city features a well-educated community where 49.9% of residents hold a bachelor’s degree or higher, and a low poverty rate of 2.1%, better than the national average, and short commute times averaging just 18.7 minutes.
Rochester has a population of 3,784 with a median age of 39.2 years. Compare Rochester with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Rochester
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Morrison | 3,781 | $67,580 | $117,300 | Compare |
| Red Bud | 3,789 | $68,051 | $170,300 | Compare |
| Dwight | 3,794 | $67,712 | $143,200 | Compare |
| Eldorado | 3,762 | $39,766 | $68,600 | Compare |
| Aledo | 3,753 | $62,829 | $140,000 | Compare |
| Oregon | 3,821 | $69,632 | $140,100 | Compare |
| Byron | 3,742 | $78,235 | $182,600 | Compare |
| St. Joseph | 3,833 | $114,594 | $257,400 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
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 Rochester
What is the population of Rochester, IL?
The population of Rochester, IL is 3,784 according to the latest Census data.
What is the median household income in Rochester?
The median household income in Rochester, IL is $112,689 per year.
What is the median home value in Rochester?
The median home value in Rochester, IL is $241,900.
What is the average rent in Rochester?
The median monthly rent in Rochester, IL is $1,333.
What is the unemployment rate in Rochester?
The unemployment rate in Rochester, IL is 3.6%.