Sleepy Hollow, Illinois Demographics & Population 2026

Population Overview

Sleepy Hollow is a small community located in Illinois, within Kane County. The total population is 3,161. It ranks as the 420th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Sleepy Hollow is 52.3 years. This is 34% higher than the state median of 39.0 years. Only 13.8% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Sleepy Hollow is $149,813. This is 80% higher than the state median of $83,390. It is also 86% higher than the national median of $80,734. The poverty rate stands at 4.7%. This is 60% lower than the state poverty rate of 11.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 5.1%. This is 13% lower than the state rate of 5.8%. The median home value is $382,800. Housing costs are 45% higher than the state median of $263,300. With a home-value-to-income ratio of just 2.6x, Sleepy Hollow is one of the most affordable housing markets in the area. 93.3% of occupied housing units are owner-occupied. This homeownership rate is 39% higher than the state average of 67.1%.

Race & Ethnicity

The largest racial or ethnic group in Sleepy Hollow is White (non-Hispanic), making up 80.1% of the population. Hispanic or Latino residents account for 12.8%. The Black or African American population (2.9%) is well below the state average of 13.3%. The Asian population (1.5%) is well below the state average of 5.9%.

Education

47.2% of residents aged 25 and older hold a bachelor's degree or higher. This places Sleepy Hollow in the top 10% of all cities in the state for educational attainment. This is 25% higher than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.4%. Notably, 17.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Sleepy Hollow, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. 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. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.