Allendale, IL
Population 491 · Illinois
About Allendale, IL
Allendale is a small community in Illinois with a population of 491 residents. The median household income is $70,500 per year, which is above the national average. The median age in Allendale is 48 years.
Housing in Allendale has a median home value of $83,500 and median monthly rent of $642. Of the 191 total housing units, the majority are owner-occupied, with 172 owner-occupied and 10 renter-occupied units.
The unemployment rate in Allendale is 21.5% and the poverty rate is 11.5%. 13.0% of residents hold a bachelor's degree or higher. The average commute time is 27.9 minutes.
Cost of Living in Allendale, IL
Compared to national averages, Allendale has a median household income of $70,500 (6% below the national median of $75,149). Home values average $83,500, which is 66% below the national median. Monthly rent at $642 is 45% below the US average of $1,163. Within Illinois, Allendale's income is 6% below the state average of $75,072, and home values are 50% below the state median of $165,779.
Why Live in Allendale, IL?
Allendale offers affordable housing with a median home value of $83,500, below the US average of $244,900, and rent that’s lower than the national average at $642/month, and a low poverty rate of 11.5%, better than the national average.
Potential considerations include median household income ($70,500) that falls below the national average. However, Allendale’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Allendale has a population of 491 with a median age of 48 years. Compare Allendale 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 Allendale
What is the population of Allendale, IL?
The population of Allendale, IL is 491 according to the latest Census data.
What is the median household income in Allendale?
The median household income in Allendale, IL is $70,500 per year.
What is the median home value in Allendale?
The median home value in Allendale, IL is $83,500.
What is the average rent in Allendale?
The median monthly rent in Allendale, IL is $642.
What is the unemployment rate in Allendale?
The unemployment rate in Allendale, IL is 21.5%.