Allendale, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Allendale, Illinois had a total population of 499, the 936th largest village in Illinois, with a median household income of $60,000, which is 28% lower than the state average. The poverty rate is 11.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 9.3% of adults have a bachelor's degree, well below the national average of 35.7%.
- Housing is very affordable with a home-value-to-income ratio of just 1.5x.
- Unemployment rate of 25.5% is notably above the national average.
Allendale Quick Facts
How Allendale 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 | 491 | 499 | +1.6% |
| Median household income | $70,500 | $60,000 | -14.9% |
| Median home value | $83,500 | $91,000 | +9.0% |
How Allendale 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+)
Allendale Rankings in Illinois
Explore Illinois Rankings
Other Cities in Wabash County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Mount Carmel | 6,854 | $47,009 | 20.3% | $89,300 |
| Bellmont | 196 | $55,000 | 19.9% | $47,800 |
| Keensburg | 149 | $73,409 | 8.1% | $67,500 |
Cities Similar to Allendale
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Olive Branch | 499 | N/A | $61,500 | 3.0% | 30.1% |
| Roberts | 487 | $60,500 | $59,700 | 14.4% | 28.9% |
| Yates City | 500 | $63,750 | $97,100 | 16.1% | 6.3% |
| Hume | 492 | $63,958 | $78,000 | 14.6% | 15.5% |
| Patoka | 498 | $65,833 | $89,200 | 13.8% | 9.3% |
A note before these figures: with a population of 499, Allendale'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
Allendale is a small community located in Illinois, within Wabash County. The total population is 499. It ranks as the 936th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Allendale is 44.1 years. This is 13% higher than the state median of 39.0 years. 10.2% 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 Allendale is $60,000. This is 28% lower than the state median of $83,390. It is also 26% lower than the national median of $80,734. The poverty rate stands at 11.3%. This is 5% lower than the state poverty rate of 11.8%. The unemployment rate is 25.5%. This is 337% higher than the state rate of 5.8%. The median home value is $91,000. Housing costs are 65% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.5x, Allendale is one of the most affordable housing markets in the area. 87.4% of occupied housing units are owner-occupied. This homeownership rate is 30% higher than the state average of 67.1%.
Race & Ethnicity
Allendale has a predominantly White (non-Hispanic) population, comprising 94.2% of all residents. Asian residents account for 1.8%. The White (non-Hispanic) population is significantly higher than the state average (94.2% vs 58.1%). The Hispanic or Latino population (0.4%) is well below the state average of 18.8%. The Asian population (1.8%) is well below the state average of 5.9%.
Education
9.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 75% 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 93.5%.
Data Sources & Methodology
All demographic data for Allendale, 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 Allendale, Illinois?
Allendale, Illinois has a population of 499 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Allendale, IL?
The median household income in Allendale is $60,000, which is 26% lower than the national median of $80,734.
What is the poverty rate in Allendale, IL?
The poverty rate in Allendale is 11.3%. This means approximately 56 residents live below the federal poverty line.
What is the racial makeup of Allendale, Illinois?
Allendale's population is 94.2% White, 0.0% Black, 0.4% Hispanic/Latino, and 1.8% Asian.
What is the median home value in Allendale, IL?
The median home value in Allendale is $91,000. The home-value-to-income ratio is 1.5x.
How educated is Allendale, Illinois?
9.3% of adults (25+) in Allendale hold a bachelor's degree or higher, and 4.4% hold a graduate or professional degree.