Sangamon County, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Sangamon 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 87% of counties in Illinois
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B
Education Around averageBetter educated than 92% of counties in Illinois
Source: Map AI Methodology
Population: density and quick facts
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 194,875 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 222.1 | 219.1 | 86.4 |
| Population growth (%/yr) | -0.24% | -0.16% | 0.59% |
| Median age | 41.9 | 37.4 | 37.3 |
| Households | 84,725 | 5,035,584 | 130,235,071 |
Population in Sangamon County grew by 0.4% from 2009 to 2024, reaching 194,875 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Sangamon County is Gen X, aged 45–60, at 21.5% of residents. That is 1.1 points above Illinois as a whole.
- Gen Z 13–28 38,227 19.6% -1.6 pts
- Millennials 29–44 39,855 20.5% -1.4 pts
- Gen X 45–60 41,870 21.5% +1.1 pts
- Boomers 61–79 35,813 18.4% +1.5 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 51.7% of the people living in Sangamon County and men 48.3%.
- Women 51.7% Illinois 50.6%
- Men 48.3% Illinois 49.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Sangamon County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Sangamon County has a the economy index of B, which means it is quite prosperous.
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $75,401 | $84,042 | $80,455 |
| Income growth (%/yr) | 3.57% | 4.46% | 4.80% |
| Unemployment rate | 5.4% | 5.8% | 5.2% |
The median household income in Sangamon County is about 10% lower than in Illinois.
Housing
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $66,497 | $149,936 | $248,835 |
| Median rent | $982 | $1,274 | $1,407 |
| Homeownership rate | 71.3% | 67.1% | 65.2% |
The median home price in Sangamon County is about 5.6 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $982 per month for that long.
Commute Time & Mobility
Commuters in Sangamon County spend about 35 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 146 hours, about 6.1 full days, spent commuting.
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 17.6 | 23.6 | 22.4 |
| Round-trip commute (min) | 35.1 | 47.3 | 44.8 |
| Yearly time spent (hours) | 146 | 197 | 187 |
| Estimated yearly cost | $4,539 | $6,104 | $5,790 |
| Work from home | 13.7% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | 5,972 | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 1,305 | 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 Sangamon County is 18 minutes, shorter 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
Sangamon County has a education index of B, which means it is quite educated.
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 32.4% | 34.1% | 31.6% |
| Average household size | 2.25 | 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
Sangamon County has a health index of B, which means it is quite healthy.
| Metric | Sangamon County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 76.9 | 77.9 | 78.3 |
| Self-rated poor health | 15.6% | 15.6% | 16.3% |
| Smokers | 19.0% | 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).
Sangamon County, IL Compared With Nearby Counties
Sangamon County, IL is the largest of the 4 counties compared here, 194,875 residents against a local median of 33,021. The measure that sets Sangamon County, IL apart most is median home price: $66,497, 24% below the local median of $87,894.
The counties themselves spread $39,347 on median home price, so Sangamon County, IL sits at one end of an already wide local range rather than apart from it. Sangamon County, IL has the 3rd highest median home price of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Sangamon County, IL | 194,875 | $75,401 #1/4 | $66,497 #3/4 | 17.6 min #3/4 |
| Christian County, IL | 33,536 | $62,799 | $54,154 | 18.3 min |
| Logan County, IL | 27,712 | $66,476 | $87,894 | 16.2 min |
| Morgan County, IL | 33,021 | $65,762 | $93,502 | 13.1 min |
Frequently Asked Questions
Common questions about Sangamon County, Illinois.
How big is Sangamon County, Illinois by population?
About 194,875 people live in Sangamon County, Illinois, in 84,725 households of 2.3 people on average. The median age is 41.9, so residents are older than the U.S. median of 37.3 by about 5 years.
Is Sangamon County, Illinois mostly urban or rural?
Averaged over its land area, Sangamon County, Illinois has 222 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 2.6 times the U.S. average of 86.
Can a typical household afford a home in Sangamon County, Illinois?
The median home costs 0.9 times the median household income ($66,497 against $75,401), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $982 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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