Demographics of Arnold city, Missouri

Arnold city, Missouri had 20,994 people on July 1, 2025, by the Census Bureau’s estimate: +87 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Arnold city, in four figures

20,994
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 20,956 ±52.; +0.4%
Change since July 2020: +87 people.; 39.7 ±2.5
Median age: ACS 2020–⁠2024.; $78,370 ±$6,883
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Arnold city, Missouri's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Arnold city, 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 — incorporated places and New England towns

About this chart

The figures

Arnold city, Missouri's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Arnold city, 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	20,907	100.0	100.0
2021	20,906	100.0	100.2
2022	20,877	99.9	100.7
2023	21,097	100.9	101.6
2024	21,048	100.7	102.5
2025	20,994	100.4	103.1

Population of Arnold city, Missouri on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	20,907	—
2021	20,906	−1
2022	20,877	−29
2023	21,097	+220
2024	21,048	−49
2025	20,994	−54

Age, 2020–2024

The median age is 39.7 ±2.5: for men 38.4 ±3.8 and for women 41.8 ±3.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Arnold city by age, ACS 2020–2024
Age	People	Share	Missouri	United States
Under 5	1,337 ±343	6.4% ±1.6	5.8% ±<0.1	5.6% ±<0.1
5 to 17	2,995 ±441	14.3% ±2.1	16.6% ±0.1	16.3% ±<0.1
18 to 24	1,126 ±239	5.4% ±1.1	9.1% ±0.1	9.1% ±<0.1
25 to 44	6,042 ±593	28.8% ±2.8	26.0% ±0.1	26.9% ±<0.1
45 to 64	5,378 ±564	25.7% ±2.7	24.6% ±0.1	24.8% ±<0.1
65 and over	4,078 ±438	19.5% ±2.1	17.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $78,370 ±$6,883, and income per person $37,598 ±$2,682, 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 Arnold city by income, ACS 2020–2024
Household income	Households	Share	Missouri	United States
Under $25,000	1,053 ±308	12.5% ±3.6	15.8% ±0.2	14.6% ±<0.1
$25,000 to $49,999	1,298 ±354	15.5% ±4.2	19.6% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,697 ±365	20.2% ±4.3	17.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,232 ±234	14.7% ±2.7	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	2,007 ±363	23.9% ±4.2	17.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	671 ±132	8.0% ±1.5	8.2% ±0.1	9.6% ±<0.1
$200,000 or more	436 ±107	5.2% ±1.3	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 Arnold city by age, ACS 2020–2024
Age	Below poverty	Rate	Missouri	United States
All ages	1,698 ±672	8.2% ±3.2	12.6% ±0.2	12.5% ±0.1
Under 18	537 ±256	12.7% ±5.8	15.8% ±0.4	16.1% ±0.1
18 to 59	665 ±300	5.9% ±2.7	12.0% ±0.2	11.6% ±0.1
60 and over	496 ±204	9.3% ±3.7	10.9% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Arnold city, ACS 2020–2024
Measure	Arnold city	Missouri	United States
Housing units	8,982 ±329	2,825,287 ±1,043	143,775,355 ±10,234
Occupied	93.5% ±1.6	88.8% ±0.2	89.9% ±0.1
Vacant	6.5% ±2.3	11.2% ±0.2	10.1% ±0.1
Owner occupied	79.8% ±4.5	68.1% ±0.3	65.2% ±0.3
Renter occupied	20.2% ±3.7	31.9% ±0.2	34.8% ±0.1
Median home value	$220,000 ±$8,959	$230,300 ±$880	$332,700 ±$236
Median gross rent	$1,112 ±$60	$1,033 ±$6	$1,413 ±$2
Median year built	1977 ±4	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 Arnold city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Missouri	United States
Hispanic or Latino	548 ±251	2.6% ±1.2	5.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	18,451 ±760	88.0% ±3.6	76.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	8 to 96	< 0.1% to 0.5%	10.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	140 to 620	0.7% to 3.0%	2.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 19	0% to 0.1%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 34	0% to 0.2%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	9 to 173	< 0.1% to 0.8%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,413 ±635	6.7% ±3.0	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 Arnold city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Missouri	United States
Born in the state	16,055 ±573	76.6% ±2.7	65.6% ±0.2	57.3% ±<0.1
Born in another state	3,645 ±554	17.4% ±2.6	29.1% ±0.1	26.9% ±<0.1
Born a citizen outside the states	45 to 253	0.2% to 1.2%	0.8% ±<0.1	1.7% ±<0.1
Born abroad	1,107 ±308	5.3% ±1.5	4.5% ±0.1	14.1% ±<0.1
Naturalized citizens	667 ±199	3.2% ±0.9	2.3% ±0.1	7.4% ±<0.1
Not citizens	216 to 664	1.0% to 3.2%	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%.

Arnold city among the places of Missouri

35th of 143 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Missouri page.

Places of Missouri near Arnold city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Nixa city	24,836 ±32
Raymore city	24,526 ±35
Webster Groves city	23,712 ±27
Ozark city	22,417 ±31
Sedalia city	22,003 ±36
Arnold city	20,956 ±52
Old Jamestown CDP	20,651 ±1,626
Rolla city	20,287 ±43
Republic city	19,829 ±181
Warrensburg city	19,582 ±39
Affton CDP	19,052 ±1,216

Sources

Census Bureau population estimates — incorporated places and New England towns — 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