Knollwood CDP, Illinois Demographics & Population 2026
As of 2026, Knollwood CDP, Illinois has a total population of 1,907, the 523rd largest city in Illinois, with a median household income of $133,452, which is 63% higher than the state average. The poverty rate is 8.8%.
Key Takeaways
- Household income is 63% above the state average — one of the wealthiest communities in Illinois.
- 45.6% of adults hold a bachelor's degree or higher — top 10% in Illinois.
- Near full employment with an unemployment rate of just 0.0%.
Knollwood CDP Quick Facts
How Knollwood CDP Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 60 | National average: 60
Education
Educational Attainment (Adults 25+)
Knollwood CDP Rankings in Illinois
Explore Illinois Rankings
Cities Similar to Knollwood CDP
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Prairie Grove village | 1,992 | $138,229 | $439,100 | 60.3% | 4.4% |
| Lake Camelot CDP | 1,744 | $128,333 | $220,300 | 38.5% | 0.0% |
| Crystal Lawns CDP | 1,965 | $109,415 | $234,600 | 28.1% | 5.8% |
| Maple Park village | 1,939 | $106,250 | $265,000 | 32.3% | 6.5% |
| Hudson village | 2,048 | $114,125 | $221,100 | 43.3% | 1.9% |
Population Overview
Knollwood CDP is a small community located in Illinois. The total population is 1,907. It ranks as the 523rd most populous out of 1,445 cities and towns in Illinois.
Age Demographics
The median age in Knollwood CDP is 36.9 years. This is 5% lower than the state median of 38.9 years. With 36.8% of the population under 18, Knollwood CDP has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Knollwood CDP is $133,452. This is 63% higher than the state median of $81,702. Compared to the national median of $78,538, household income here is 70% higher. The poverty rate stands at 8.8%. This is 25% lower than the state poverty rate of 11.7%. The unemployment rate is 0.0%. This is 100% lower than the state rate of 5.8%. The median home value is $372,500. Housing costs are 49% higher than the state median of $250,500. With a home-value-to-income ratio of just 2.8x, Knollwood CDP is one of the most affordable housing markets in the area. 76.8% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 66.8%.
Race & Ethnicity
The largest racial or ethnic group in Knollwood CDP is White (non-Hispanic), making up 75.6% of the population. Hispanic or Latino residents account for 15.9%. The Black or African American population (6.1%) is well below the state average of 13.6%. The Asian population (1.4%) is well below the state average of 5.8%.
Education
45.6% of residents aged 25 and older hold a bachelor's degree or higher. This places Knollwood CDP in the top 10% of all cities in the state for educational attainment. This is 23% higher than the state rate of 37.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.7%.
Data Sources & Methodology
All demographic data for Knollwood CDP, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. For official data, visit data.census.gov.
Free data download: Get all Illinois city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Knollwood CDP, Illinois?
Knollwood CDP, Illinois has a population of 1,907 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Knollwood CDP, IL?
The median household income in Knollwood CDP is $133,452, which is 70% higher the national median of $78,538.
What is the poverty rate in Knollwood CDP, IL?
The poverty rate in Knollwood CDP is 8.8%. This means approximately 160 residents live below the federal poverty line.
What is the racial makeup of Knollwood CDP, Illinois?
Knollwood CDP's population is 75.6% White, 6.1% Black, 15.9% Hispanic/Latino, and 1.4% Asian.
What is the median home value in Knollwood CDP, IL?
The median home value in Knollwood CDP is $372,500. The home-value-to-income ratio is 2.8x.
How educated is Knollwood CDP, Illinois?
45.6% of adults (25+) in Knollwood CDP hold a bachelor's degree or higher, and 13.0% hold a graduate or professional degree.