Demographics of Grundy County, Missouri

Grundy County, Missouri had 9,744 people on July 1, 2025, by the Census Bureau’s estimate: −20 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.

Grundy County, in four figures

9,744
Population: July 1, 2025, Vintage 2025 estimate.; −0.2%
Change since July 2020: −20 people.; 40.6 ±1.4
Median age: ACS 2020–⁠2024.; $51,975 ±$3,908
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.

Grundy County, Missouri's population shrank 0.2% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Grundy 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

Grundy County, Missouri's population shrank 0.2% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Grundy 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	9,764	100.0	100.0
2021	9,765	100.0	100.2
2022	9,823	100.6	100.7
2023	9,808	100.5	101.6
2024	9,749	99.8	102.5
2025	9,744	99.8	103.1

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Population of Grundy 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	9,764	−51	−6	0	−41
2021	9,765	+1	−29	+2	+20
2022	9,823	+58	−42	+6	+95
2023	9,808	−15	+1	+10	−24
2024	9,749	−59	−7	+4	−58
2025	9,744	−5	−8	+1	+2

Age, 2020–2024

The median age is 40.6 ±1.4: for men 38.4 ±0.9 and for women 42.5 ±0.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Grundy County by age, ACS 2020–2024
Age	People	Share	Missouri	United States
Under 5	718 ±55	7.3% ±0.6	5.8% ±<0.1	5.6% ±<0.1
5 to 17	1,815 ±150	18.5% ±1.5	16.6% ±0.1	16.3% ±<0.1
18 to 24	639 ±88	6.5% ±0.9	9.1% ±0.1	9.1% ±<0.1
25 to 44	2,139 ±131	21.9% ±1.3	26.0% ±0.1	26.9% ±<0.1
45 to 64	2,278 ±182	23.3% ±1.9	24.6% ±0.1	24.8% ±<0.1
65 and over	2,198 ±194	22.5% ±2.0	17.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $51,975 ±$3,908, and income per person $31,335 ±$4,438, 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 Grundy County by income, ACS 2020–2024
Household income	Households	Share	Missouri	United States
Under $25,000	1,053 ±189	27.0% ±4.7	15.8% ±0.2	14.6% ±<0.1
$25,000 to $49,999	812 ±144	20.8% ±3.5	19.6% ±0.2	16.7% ±<0.1
$50,000 to $74,999	621 ±137	15.9% ±3.4	17.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	512 ±105	13.1% ±2.6	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	595 ±123	15.2% ±3.1	17.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	203 ±63	5.2% ±1.6	8.2% ±0.1	9.6% ±<0.1
$200,000 or more	111 ±44	2.8% ±1.1	8.7% ±0.1	13.4% ±0.1

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 Grundy County by age, ACS 2020–2024
Age	Below poverty	Rate	Missouri	United States
All ages	1,668 ±309	17.6% ±3.3	12.6% ±0.2	12.5% ±0.1
Under 18	454 ±135	18.1% ±5.1	15.8% ±0.4	16.1% ±0.1
18 to 59	811 ±177	19.1% ±4.0	12.0% ±0.2	11.6% ±0.1
60 and over	403 ±112	14.8% ±4.0	10.9% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Grundy County, ACS 2020–2024
Measure	Grundy County	Missouri	United States
Housing units	4,834 ±24	2,825,287 ±1,043	143,775,355 ±10,234
Occupied	80.8% ±3.8	88.8% ±0.2	89.9% ±0.1
Vacant	19.2% ±3.7	11.2% ±0.2	10.1% ±0.1
Owner occupied	69.7% ±3.3	68.1% ±0.3	65.2% ±0.3
Renter occupied	30.3% ±4.3	31.9% ±0.2	34.8% ±0.1
Median home value	$112,500 ±$10,773	$230,300 ±$880	$332,700 ±$236
Median gross rent	$696 ±$72	$1,033 ±$6	$1,413 ±$2
Median year built	1963 ±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 Grundy County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Missouri	United States
Hispanic or Latino	273 ±0	2.8% ±<0.1	5.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,012 ±85	92.1% ±0.9	76.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	12 to 76	0.1% to 0.8%	10.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	71 ±35	0.7% ±0.4	2.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1 to 39	< 0.1% to 0.4%	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 89	0% to 0.9%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	328 ±113	3.4% ±1.2	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 Grundy County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Missouri	United States
Born in the state	7,605 ±250	77.7% ±2.6	65.6% ±0.2	57.3% ±<0.1
Born in another state	1,998 ±237	20.4% ±2.4	29.1% ±0.1	26.9% ±<0.1
Born a citizen outside the states	15 to 115	0.2% to 1.2%	0.8% ±<0.1	1.7% ±<0.1
Born abroad	59 to 179	0.6% to 1.8%	4.5% ±0.1	14.1% ±<0.1
Naturalized citizens	31 to 95	0.3% to 1.0%	2.3% ±0.1	7.4% ±<0.1
Not citizens	9 to 103	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%.

Grundy County among the counties of Missouri

88th of 115 by population, July 2025. Every one is listed on the Missouri page.

Counties of Missouri near Grundy County in population, July 2025
County	July 2025	Change since 2020
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%
Caldwell County	9,012	+2.1%
Monroe County	8,959	+3.1%

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