Lake Summerset, Illinois Demographics & Population 2026

Population Overview

Lake Summerset is a small community located in Illinois, within Winnebago County. The total population is 2,364. It ranks as the 473rd most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Lake Summerset is 45.1 years. This is 16% higher than the state median of 39.0 years. 15.3% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Lake Summerset is $108,355. This is 30% higher than the state median of $83,390. It is also 34% higher than the national median of $80,734. The poverty rate stands at 3.0%. This is 74% 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 15.9%. This is 172% higher than the state rate of 5.8%. The median home value is $237,300. Housing costs are 10% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.2x, Lake Summerset is one of the most affordable housing markets in the area. 91.6% of occupied housing units are owner-occupied. This homeownership rate is 37% higher than the state average of 67.1%.

Race & Ethnicity

Lake Summerset has a predominantly White (non-Hispanic) population, comprising 93.2% of all residents. Hispanic or Latino residents account for 4.9%. The White (non-Hispanic) population is significantly higher than the state average (93.2% vs 58.1%). The Black or African American population (1.0%) is well below the state average of 13.3%. The Hispanic or Latino population (4.9%) is well below the state average of 18.8%. The Asian population (0.3%) is well below the state average of 5.9%.

Education

30.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% lower 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 95.8%.

Data Sources & Methodology

All demographic data for Lake Summerset, 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.