Spring Bay, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Spring Bay, Illinois had a total population of 520, the 923rd largest village in Illinois, with a median household income of $61,389, which is 26% lower than the state average. The poverty rate is 19.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 2.1x.
Spring Bay Quick Facts
How Spring Bay Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 519 | 520 | +0.2% |
| Median household income | $61,111 | $61,389 | +0.5% |
| Median home value | $134,900 | $130,200 | -3.5% |
How Spring Bay Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Spring Bay Rankings in Illinois
Explore Illinois Rankings
Other Cities in Woodford County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Eureka | 5,007 | $56,048 | 10.8% | $154,300 |
| Metamora | 4,159 | $129,479 | 3.6% | $201,800 |
| Germantown Hills | 3,436 | $147,341 | 5.4% | $264,900 |
| Roanoke | 1,967 | $82,063 | 5.5% | $139,900 |
| Minonk | 1,941 | $69,352 | 10.3% | $120,500 |
| Washburn | 945 | $76,667 | 7.5% | $89,100 |
| Congerville | 752 | $81,250 | 1.7% | $200,000 |
| Benson | 428 | $76,333 | 3.5% | $114,900 |
| Secor | 300 | $83,125 | 10.7% | $113,000 |
| Bay View Gardens | 281 | $52,679 | 18.9% | $122,800 |
Cities Similar to Spring Bay
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Thayer | 531 | $62,083 | $97,100 | 10.3% | 10.5% |
| Iuka | 534 | $61,146 | $72,600 | 14.4% | 9.6% |
| Cowden | 534 | $62,031 | $77,000 | 10.1% | 20.4% |
| Davis | 535 | $62,050 | $142,700 | 19.8% | 6.9% |
| Olive Branch | 499 | N/A | $61,500 | 3.0% | 30.1% |
A note before these figures: with a population of 520, Spring Bay's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Spring Bay is a small community located in Illinois, within Woodford County. The total population is 520. It ranks as the 923rd most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Spring Bay is 41.7 years. This is 7% higher than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Spring Bay is $61,389. This is 26% lower than the state median of $83,390. It is also 24% lower than the national median of $80,734. The poverty rate stands at 19.2%. This is 63% higher than the state poverty rate of 11.8%. The unemployment rate is 7.3%. This is 25% higher than the state rate of 5.8%. The median home value is $130,200. Housing costs are 51% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.1x, Spring Bay is one of the most affordable housing markets in the area. 66.0% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 67.1%.
Race & Ethnicity
Spring Bay has a predominantly White (non-Hispanic) population, comprising 95.4% of all residents. Hispanic or Latino residents account for 1.1%. The White (non-Hispanic) population is significantly higher than the state average (95.4% vs 58.1%). The Hispanic or Latino population (1.1%) is well below the state average of 18.8%. The Asian population (0.6%) is well below the state average of 5.9%.
Education
12.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 66% 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 93.0%.
Data Sources & Methodology
All demographic data for Spring Bay, 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.
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Frequently Asked Questions
What is the population of Spring Bay, Illinois?
Spring Bay, Illinois has a population of 520 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Spring Bay, IL?
The median household income in Spring Bay is $61,389, which is 24% lower than the national median of $80,734.
What is the poverty rate in Spring Bay, IL?
The poverty rate in Spring Bay is 19.2%. This means approximately 100 residents live below the federal poverty line.
What is the racial makeup of Spring Bay, Illinois?
Spring Bay's population is 95.4% White, 0.0% Black, 1.1% Hispanic/Latino, and 0.6% Asian.
What is the median home value in Spring Bay, IL?
The median home value in Spring Bay is $130,200. The home-value-to-income ratio is 2.1x.
How educated is Spring Bay, Illinois?
12.7% of adults (25+) in Spring Bay hold a bachelor's degree or higher, and 0.3% hold a graduate or professional degree.