St. Jacob, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, St. Jacob, Illinois had a total population of 1,759, the 537th largest village in Illinois, with a median household income of $112,188, which is 35% higher than the state average. The poverty rate is 3.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 35% above the state average — one of the wealthiest communities in Illinois.
- An exceptionally low poverty rate of 3.0% — among the lowest in Illinois.
- Housing is very affordable with a home-value-to-income ratio of just 1.8x.
- Near full employment with an unemployment rate of just 2.4%.
St. Jacob Quick Facts
How St. Jacob 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 | 1,617 | 1,759 | +8.8% |
| Median household income | $107,188 | $112,188 | +4.7% |
| Median home value | $192,400 | $201,000 | +4.5% |
How St. Jacob 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+)
St. Jacob Rankings in Illinois
Explore Illinois Rankings
Other Cities in Madison County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Granite City | 26,549 | $59,205 | 14.8% | $104,300 |
| Edwardsville | 26,474 | $86,721 | 11.6% | $299,800 |
| Alton | 25,279 | $54,568 | 21.0% | $103,700 |
| Collinsville | 24,031 | $67,612 | 12.0% | $163,600 |
| Godfrey | 17,712 | $94,543 | 6.4% | $192,200 |
| Glen Carbon | 13,977 | $97,168 | 4.9% | $282,000 |
| Troy | 11,647 | $112,434 | 2.0% | $268,000 |
| Wood River | 10,279 | $62,703 | 13.9% | $108,100 |
| Highland | 10,262 | $82,551 | 6.0% | $202,900 |
| Bethalto | 9,239 | $64,775 | 12.3% | $168,900 |
Cities Similar to St. Jacob
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Teutopolis | 1,729 | $115,938 | $247,700 | 40.4% | 2.8% |
| The Galena Territory | 1,735 | $117,548 | $324,700 | 56.5% | 2.5% |
| Port Byron | 1,854 | $111,667 | $278,200 | 36.9% | 7.3% |
| Downs | 1,641 | $110,625 | $240,600 | 55.9% | 10.8% |
| Hudson | 1,918 | $110,000 | $224,700 | 44.0% | 2.4% |
Population Overview
St. Jacob is a small community located in Illinois, within Madison County. The total population is 1,759. It ranks as the 537th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in St. Jacob is 33.9 years. This is 13% lower than the state median of 39.0 years. With 37.0% of the population under 18, St. Jacob has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in St. Jacob is $112,188. This is 35% higher than the state median of $83,390. It is also 39% 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 2.4%. This is 58% lower than the state rate of 5.8%. The median home value is $201,000. Housing costs are 24% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.8x, St. Jacob is one of the most affordable housing markets in the area. 85.5% of occupied housing units are owner-occupied. This homeownership rate is 28% higher than the state average of 67.1%.
Race & Ethnicity
St. Jacob has a predominantly White (non-Hispanic) population, comprising 92.2% of all residents. Hispanic or Latino residents account for 1.1%. The White (non-Hispanic) population is significantly higher than the state average (92.2% vs 58.1%). The Hispanic or Latino population (1.1%) is well below the state average of 18.8%.
Education
34.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% 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 95.6%.
Data Sources & Methodology
All demographic data for St. Jacob, 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 St. Jacob, Illinois?
St. Jacob, Illinois has a population of 1,759 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Jacob, IL?
The median household income in St. Jacob is $112,188, which is 39% higher than the national median of $80,734.
What is the poverty rate in St. Jacob, IL?
The poverty rate in St. Jacob is 3.0%. This means approximately 53 residents live below the federal poverty line.
What is the racial makeup of St. Jacob, Illinois?
St. Jacob's population is 92.2% White, 0.0% Black, 1.1% Hispanic/Latino, and 0.0% Asian.
What is the median home value in St. Jacob, IL?
The median home value in St. Jacob is $201,000. The home-value-to-income ratio is 1.8x.
How educated is St. Jacob, Illinois?
34.2% of adults (25+) in St. Jacob hold a bachelor's degree or higher, and 14.1% hold a graduate or professional degree.