Williamsville, IL
Population 1,519 · Illinois
About Williamsville, IL
Williamsville is a small community in Illinois with a population of 1,519 residents. The median household income is $104,135 per year, which is above the national average. The median age in Williamsville is 44.1 years.
Housing in Williamsville has a median home value of $187,000 and median monthly rent of $1,055. Of the 656 total housing units, the majority are owner-occupied, with 555 owner-occupied and 89 renter-occupied units.
The unemployment rate in Williamsville is 1.8% and the poverty rate is 7.5%. 39.5% of residents hold a bachelor's degree or higher. The average commute time is 21.1 minutes.
Cost of Living in Williamsville, IL
Compared to national averages, Williamsville has a median household income of $104,135 (39% above the national median of $75,149). Home values average $187,000, which is 24% below the national median. Monthly rent at $1,055 is 9% below the US average of $1,163. Within Illinois, Williamsville's income is 39% above the state average of $75,072, and home values are 13% above the state median of $165,779.
Why Live in Williamsville, IL?
Williamsville offers a strong local economy with a median household income of $104,135, well above the national average, and affordable housing with a median home value of $187,000, below the US average of $244,900, and rent that’s lower than the national average at $1,055/month. Additionally, the city features a strong job market with an unemployment rate of just 1.8%, and a well-educated community where 39.5% of residents hold a bachelor’s degree or higher, and a low poverty rate of 7.5%, better than the national average, and short commute times averaging just 21.1 minutes.
Williamsville has a population of 1,519 with a median age of 44.1 years. Compare Williamsville with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Williamsville
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Grayville | 1,515 | $47,308 | $76,000 | Compare |
| Mount Carroll | 1,515 | $59,167 | $88,800 | Compare |
| Mount Pulaski | 1,513 | $70,175 | $113,400 | Compare |
| Harristown | 1,526 | $74,018 | $116,700 | Compare |
| Thomson | 1,526 | $54,063 | $122,300 | Compare |
| Warsaw | 1,511 | $58,074 | $90,700 | Compare |
| Lanark | 1,510 | $66,250 | $97,100 | Compare |
| Malta | 1,507 | $83,611 | $178,900 | 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 Williamsville
What is the population of Williamsville, IL?
The population of Williamsville, IL is 1,519 according to the latest Census data.
What is the median household income in Williamsville?
The median household income in Williamsville, IL is $104,135 per year.
What is the median home value in Williamsville?
The median home value in Williamsville, IL is $187,000.
What is the average rent in Williamsville?
The median monthly rent in Williamsville, IL is $1,055.
What is the unemployment rate in Williamsville?
The unemployment rate in Williamsville, IL is 1.8%.