Demographics of Lewis County, Missouri

Lewis County, Missouri had 9,879 people on July 1, 2025, by the Census Bureau’s estimate: −163 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Lewis County, in four figures

9,879
Population: July 1, 2025, Vintage 2025 estimate.; −1.6%
Change since July 2020: −163 people.; 37.6 ±0.8
Median age: ACS 2020–⁠2024.; $59,934 ±$3,745
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Lewis County, Missouri's population shrank 1.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Lewis County, Missouri's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Lewis County, Missouri's population shrank 1.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Lewis County, Missouri's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	10,042	100.0	100.0
2021	10,005	99.6	100.2
2022	9,891	98.5	100.7
2023	9,834	97.9	101.6
2024	9,853	98.1	102.5
2025	9,879	98.4	103.1

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Population of Lewis County, Missouri on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	10,042	+4	−3	0	+4
2021	10,005	−37	−38	+1	−5
2022	9,891	−114	−66	+2	−43
2023	9,834	−57	−37	+6	−24
2024	9,853	+19	−18	+9	+29
2025	9,879	+26	+4	+6	+16

Age, 2020–2024

The median age is 37.6 ±0.8: for men 36.0 ±2.0 and for women 39.3 ±1.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Lewis County by age, ACS 2020–2024
Age	People	Share	Missouri	United States
Under 5	518 ±39	5.2% ±0.4	5.8% ±<0.1	5.6% ±<0.1
5 to 17	1,590 ±131	16.0% ±1.3	16.6% ±0.1	16.3% ±<0.1
18 to 24	1,540 ±215	15.5% ±2.2	9.1% ±0.1	9.1% ±<0.1
25 to 44	2,027 ±169	20.4% ±1.7	26.0% ±0.1	26.9% ±<0.1
45 to 64	2,337 ±166	23.5% ±1.7	24.6% ±0.1	24.8% ±<0.1
65 and over	1,912 ±178	19.3% ±1.8	17.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $59,934 ±$3,745, and income per person $28,581 ±$2,569, in 2024 dollars. The median is $70,702 ±$325 in Missouri and $80,734 ±$166 in the United States.

Households by income

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Households in Lewis County by income, ACS 2020–2024
Household income	Households	Share	Missouri	United States
Under $25,000	643 ±124	20.2% ±3.8	15.8% ±0.2	14.6% ±<0.1
$25,000 to $49,999	682 ±129	21.4% ±3.9	19.6% ±0.2	16.7% ±<0.1
$50,000 to $74,999	594 ±120	18.6% ±3.7	17.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	479 ±79	15.0% ±2.4	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	486 ±102	15.3% ±3.1	17.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	150 ±57	4.7% ±1.8	8.2% ±0.1	9.6% ±<0.1
$200,000 or more	56 to 246	1.8% to 7.7%	8.7% ±0.1	13.4% ±0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Lewis County by age, ACS 2020–2024
Age	Below poverty	Rate	Missouri	United States
All ages	1,161 ±271	12.7% ±3.0	12.6% ±0.2	12.5% ±0.1
Under 18	147 to 437	14.1% ±6.8	15.8% ±0.4	16.1% ±0.1
18 to 59	459 ±142	9.8% ±3.0	12.0% ±0.2	11.6% ±0.1
60 and over	410 ±114	17.0% ±4.5	10.9% ±0.2	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Lewis County, ACS 2020–2024
Measure	Lewis County	Missouri	United States
Housing units	4,320 ±29	2,825,287 ±1,043	143,775,355 ±10,234
Occupied	73.7% ±3.3	88.8% ±0.2	89.9% ±0.1
Vacant	26.3% ±3.4	11.2% ±0.2	10.1% ±0.1
Owner occupied	76.3% ±2.5	68.1% ±0.3	65.2% ±0.3
Renter occupied	23.7% ±3.3	31.9% ±0.2	34.8% ±0.1
Median home value	$130,200 ±$13,476	$230,300 ±$880	$332,700 ±$236
Median gross rent	$644 ±$68	$1,033 ±$6	$1,413 ±$2
Median year built	1969 ±2	1978 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Lewis County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Missouri	United States
Hispanic or Latino	53 to 169	0.5% to 1.7%	5.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,084 ±34	91.5% ±0.3	76.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	383 ±111	3.9% ±1.1	10.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	20 to 80	0.2% to 0.8%	2.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 5	0% to 0.1%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 17	0% to 0.2%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 11	0% to 0.1%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	290 ±95	2.9% ±1.0	4.8% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Lewis County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Missouri	United States
Born in the state	4,119 ±385	41.5% ±3.9	65.6% ±0.2	57.3% ±<0.1
Born in another state	5,694 ±379	57.4% ±3.8	29.1% ±0.1	26.9% ±<0.1
Born a citizen outside the states	0 to 106	0% to 1.1%	0.8% ±<0.1	1.7% ±<0.1
Born abroad	10 to 108	0.1% to 1.1%	4.5% ±0.1	14.1% ±<0.1
Naturalized citizens	0 to 10	0% to 0.1%	2.3% ±0.1	7.4% ±<0.1
Not citizens	4 to 108	< 0.1% to 1.1%	2.2% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Lewis County among the counties of Missouri

86th of 115 by population, July 2025. Every one is listed on the Missouri page.

Counties of Missouri near Lewis County in population, July 2025
County	July 2025	Change since 2020
Ripley County	10,717	+0.4%
Bollinger County	10,646	+0.9%
Ralls County	10,444	+0.9%
Howard County	10,180	+0.3%
St. Clair County	9,976	+6.7%
Lewis County	9,879	−1.6%
DeKalb County	9,795	−15.6%
Grundy County	9,744	−0.2%
Iron County	9,318	−2.0%
Ozark County	9,172	+7.7%
Hickory County	9,044	+8.9%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026