Lewis County, Missouri Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Lewis County, MO 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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C
Health Below average
-
D
Income Well below average
-
F
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Population | 9,924 | 6,186,340 | 337,468,954 |
| Population density (per sq mi) | 19.4 | 88.8 | 86.4 |
| Population growth (%/yr) | -0.27% | 0.28% | 0.59% |
| Median age | 35.5 | 37.5 | 37.3 |
| Households | 3,185 | 2,507,647 | 130,235,071 |
Population in Lewis County declined by 0.3% from 2009 to 2024, reaching 9,924 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Lewis County is Gen Z, aged 13–28, at 24.8% of residents. That is 3.6 points above Missouri as a whole.
- Gen Z 13–28 2,458 24.8% +3.6 pts
- Millennials 29–44 1,664 16.8% -4.5 pts
- Gen X 45–60 2,043 20.6% +1.0 pts
- Boomers 61–79 1,708 17.2% -0.7 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 Missouri, 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 49.5% of the people living in Lewis County and men 50.5%.
- Women 49.5% Missouri 50.7%
- Men 50.5% Missouri 49.3%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Lewis County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Lewis County has a the economy index of D, which means it is barely prosperous.
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median household income | $59,906 | $70,801 | $80,455 |
| Income growth (%/yr) | 3.58% | 4.56% | 4.80% |
| Unemployment rate | 5.1% | 4.0% | 5.2% |
The median household income in Lewis County is about 15% lower than in Missouri.
Housing
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median home price | $159,523 | $145,462 | $248,835 |
| Median rent | $643 | $1,033 | $1,407 |
| Homeownership rate | 76.3% | 68.1% | 65.2% |
The median home price in Lewis County is about 20.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $643 per month for that long.
Commute Time & Mobility
Commuters in Lewis County spend about 44 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 185 hours, about 7.7 full days, spent commuting.
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 22.2 | 21.0 | 22.4 |
| Round-trip commute (min) | 44.4 | 41.9 | 44.8 |
| Yearly time spent (hours) | 185 | 175 | 187 |
| Estimated yearly cost | $5,732 | $5,415 | $5,790 |
| Work from home | 9.0% | 13.0% | 15.0% |
| Highway traffic (vehicles/day) | 3,017 | 7,545 | 8,813 |
| Local road traffic (vehicles/day) | 670 | 923 | 1,355 |
Fastest commutes among counties in
Missouri:
Saline County (11.9 min), Adair County (12.0 min), Nodaway County (12.1 min).
Slowest:
Bollinger County (33.1 min), Ray County (32.2 min), Maries County (31.9 min).
The average commute time in Lewis County is 22 minutes, longer than the 21 minutes in Missouri.
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
Lewis County has a education index of F, which means it scores poorly in education.
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 12.9% | 28.8% | 31.6% |
| Average household size | 2.87 | 2.40 | 2.53 |
Highest education index among counties in
Missouri:
St. Louis County (0.4), Platte County (0.4), Boone County (0.4).
Lowest:
Bollinger County (0.2), Wayne County (0.2), Ripley County (0.2).
Health
Lewis County has a health index of C, which means it is somewhat healthy.
| Metric | Lewis County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.1 | 76.9 | 78.3 |
| Self-rated poor health | 18.7% | 19.0% | 16.3% |
| Smokers | 23.1% | 22.8% | 19.0% |
Highest health index among counties in
Missouri:
St. Charles County (0.8), Platte County (0.8), Boone County (0.8).
Lowest:
Scotland County (0.7), Ripley County (0.7), Pemiscot County (0.8).
Lewis County, MO Compared With Nearby Counties
How Lewis County, MO compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Lewis County, MO | 9,924 | $59,906 #3/3 | $159,523 #2/3 | 22.2 min #3/3 |
| Marion County, MO | 28,457 | $63,331 | $79,047 | 13.8 min |
| Adams County, IL | 64,753 | $66,119 | $202,885 | 13.7 min |
Frequently Asked Questions
Common questions about Lewis County, Missouri.
How many people live in Lewis County, Missouri?
About 9,924 people live in Lewis County, Missouri, in 3,185 households of 2.9 people on average. The median age is 35.5, so residents are younger than the U.S. median of 37.3 by about 2 years.
How densely populated is Lewis County, Missouri?
Averaged over its land area, Lewis County, Missouri has 19 people per square mile, a density typical of rural areas. That is about 22% of the U.S. average of 86.
How affordable is housing in Lewis County, Missouri?
The median home costs 2.7 times the median household income ($159,523 against $59,906), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $643 a month takes about 13% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How common is a college degree in Lewis County, Missouri?
12.9% of adults in Lewis County, Missouri hold a bachelor's degree or higher (about 1 in 8), well below the U.S. share of 31.6%.
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