Marshall County, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Marshall County, IL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around average
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B
Income Around averageWealthier than 72% of counties in Illinois
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D
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 11,645 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 29.2 | 219.1 | 86.4 |
| Population growth (%/yr) | -0.43% | -0.16% | 0.59% |
| Median age | 46.3 | 37.4 | 37.3 |
| Households | 5,093 | 5,035,584 | 130,235,071 |
Population in Marshall County declined by 9.3% from 2009 to 2024, reaching 11,645 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Marshall County is Boomers, aged 61–79, at 22.7% of residents. That is 5.8 points above Illinois as a whole.
- Gen Z 13–28 2,025 17.4% -3.9 pts
- Millennials 29–44 2,046 17.6% -4.3 pts
- Gen X 45–60 2,501 21.5% +1.1 pts
- Boomers 61–79 2,641 22.7% +5.8 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Illinois, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.8% of the people living in Marshall County and men 50.2%.
- Women 49.8% Illinois 50.6%
- Men 50.2% Illinois 49.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Marshall County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Marshall County has a the economy index of B, which means it is quite prosperous.
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $71,225 | $84,042 | $80,455 |
| Income growth (%/yr) | 3.30% | 4.46% | 4.80% |
| Unemployment rate | 3.8% | 5.8% | 5.2% |
The median household income in Marshall County is about 15% lower than in Illinois.
Housing
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $73,572 | $149,936 | $248,835 |
| Median rent | $782 | $1,274 | $1,407 |
| Homeownership rate | 79.2% | 67.1% | 65.2% |
The median home price in Marshall County is about 7.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $782 per month for that long.
Commute Time & Mobility
Commuters in Marshall County spend about 52 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 215 hours, about 9.0 full days, spent commuting.
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.8 | 23.6 | 22.4 |
| Round-trip commute (min) | 51.6 | 47.3 | 44.8 |
| Yearly time spent (hours) | 215 | 197 | 187 |
| Estimated yearly cost | $6,663 | $6,104 | $5,790 |
| Work from home | 6.6% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | 3,395 | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 457 | 1,547 | 1,355 |
Fastest commutes among counties in
Illinois:
Edgar County (12.0 min), Brown County (12.7 min), Morgan County (13.1 min).
Slowest:
Calhoun County (43.8 min), Pulaski County (31.2 min), Pope County (31.0 min).
The average commute time in Marshall County is 26 minutes, longer than the 24 minutes in Illinois.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Marshall County has a education index of D, which means it is barely educated.
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 16.3% | 34.1% | 31.6% |
| Average household size | 2.23 | 2.46 | 2.53 |
Highest education index among counties in
Illinois:
DuPage County (0.4), Champaign County (0.4), Lake County (0.4).
Lowest:
Hardin County (0.2), Fayette County (0.2), Perry County (0.2).
Health
Marshall County has a health index of B, which means it is quite healthy.
| Metric | Marshall County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 76.7 | 77.9 | 78.3 |
| Self-rated poor health | 14.8% | 15.6% | 16.3% |
| Smokers | 18.1% | 19.2% | 19.0% |
Highest health index among counties in
Illinois:
DuPage County (0.8), Champaign County (0.8), Monroe County (0.8).
Lowest:
Alexander County (0.8), Pulaski County (0.8), Gallatin County (0.8).
Marshall County, IL Compared With Nearby Counties
Marshall County, IL is the smallest of the 4 counties compared here, 11,645 residents against a local median of 38,283. The measure that sets Marshall County, IL apart most is median home price: $73,572, 60% above the local median of $45,985.
Commute tells the same story from another angle: 25.8 min against a local median of 17.7 min, 46% above it. The one measure here that carries a verdict is commute, and at 46% above the local median it puts Marshall County, IL at the weaker end of the local range. The counties themselves spread $47,936 on median home price, so Marshall County, IL sits at one end of an already wide local range rather than apart from it. Marshall County, IL has the 2nd highest median home price of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Marshall County, IL | 11,645 | $71,225 #2/4 | $73,572 #2/4 | 25.8 min #4/4 |
| Woodford County, IL | 38,283 | $92,853 | $45,985 | 22.6 min |
| Bureau County, IL | 32,861 | $69,533 | $87,129 | 17.7 min |
| Peoria County, IL | 179,437 | $66,474 | $39,193 | 17.4 min |
Frequently Asked Questions
Common questions about Marshall County, Illinois.
How many people live in Marshall County, Illinois?
About 11,645 people live in Marshall County, Illinois, in 5,093 households of 2.2 people on average. The median age is 46.3, so residents are older than the U.S. median of 37.3 by about 9 years.
How densely populated is Marshall County, Illinois?
Averaged over its land area, Marshall County, Illinois has 29 people per square mile, a density typical of rural areas. That is about 34% of the U.S. average of 86.
Can a typical household afford a home in Marshall County, Illinois?
The median home costs 1.0 times the median household income ($73,572 against $71,225), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $782 a month takes about 13% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Marshall County, Illinois?
Unemployment in Marshall County, Illinois is only 3.8%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in Marshall County, Illinois?
16.3% of adults in Marshall County, Illinois hold a bachelor's degree or higher (about 1 in 6), well below the U.S. share of 31.6%.
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