Mark, IL
Population 522 · Illinois
About Mark, IL
Mark is a small community in Illinois with a population of 522 residents. The median household income is $79,911 per year, which is above the national average. The median age in Mark is 45 years.
Housing in Mark has a median home value of $154,800 and median monthly rent of $856. Of the 282 total housing units, the majority are owner-occupied, with 190 owner-occupied and 61 renter-occupied units.
The unemployment rate in Mark is 1.4% and the poverty rate is 4.8%. 22.7% of residents hold a bachelor's degree or higher. The average commute time is 21.4 minutes.
Cost of Living in Mark, IL
Compared to national averages, Mark has a median household income of $79,911 (6% above the national median of $75,149). Home values average $154,800, which is 37% below the national median. Monthly rent at $856 is 26% below the US average of $1,163. Within Illinois, Mark's income is 6% above the state average of $75,072, and home values are 7% below the state median of $165,779.
Why Live in Mark, IL?
Mark offers a strong local economy with a median household income of $79,911, well above the national average, and affordable housing with a median home value of $154,800, below the US average of $244,900, and rent that’s lower than the national average at $856/month. Additionally, the city features a strong job market with an unemployment rate of just 1.4%, and a low poverty rate of 4.8%, better than the national average, and short commute times averaging just 21.4 minutes.
Mark has a population of 522 with a median age of 45 years. Compare Mark with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Mark
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Keithsburg | 520 | $46,875 | $58,800 | Compare |
| Palmyra | 524 | $46,477 | $86,400 | Compare |
| Altona | 519 | $67,125 | $89,200 | Compare |
| Spring Bay | 519 | $61,111 | $134,900 | Compare |
| New Haven | 528 | $33,977 | $50,400 | Compare |
| Pittsburg | 515 | $54,063 | $101,900 | Compare |
| Lenzburg | 513 | $44,722 | $92,500 | Compare |
| Strasburg | 513 | $65,833 | $101,200 | 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 Mark
What is the population of Mark, IL?
The population of Mark, IL is 522 according to the latest Census data.
What is the median household income in Mark?
The median household income in Mark, IL is $79,911 per year.
What is the median home value in Mark?
The median home value in Mark, IL is $154,800.
What is the average rent in Mark?
The median monthly rent in Mark, IL is $856.
What is the unemployment rate in Mark?
The unemployment rate in Mark, IL is 1.4%.