Demographics of Jasper County, Iowa

Jasper County, Iowa had 38,153 people on July 1, 2025, by the Census Bureau’s estimate: +332 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.

Jasper County, in four figures

38,153
Population: July 1, 2025, Vintage 2025 estimate.; +0.9%
Change since July 2020: +332 people.; 41.3 ±0.6
Median age: ACS 2020–⁠2024.; $71,311 ±$2,918
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.

Jasper County, Iowa's population grew 0.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Jasper County, Iowa'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

Jasper County, Iowa's population grew 0.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Jasper County, Iowa'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	37,821	100.0	100.0
2021	37,895	100.2	100.2
2022	37,948	100.3	100.7
2023	37,990	100.4	101.6
2024	38,122	100.8	102.5
2025	38,153	100.9	103.1

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Population of Jasper County, Iowa on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	37,821	+5	−1	0	−5
2021	37,895	+74	−61	+30	+75
2022	37,948	+53	−66	+48	+101
2023	37,990	+42	+14	+114	−80
2024	38,122	+132	+60	+89	−11
2025	38,153	+31	+55	+69	−94

Age, 2020–2024

The median age is 41.3 ±0.6: for men 39.9 ±0.6 and for women 43.0 ±0.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Jasper County by age, ACS 2020–2024
Age	People	Share	Iowa	United States
Under 5	1,960 ±51	5.2% ±0.1	5.9% ±<0.1	5.6% ±<0.1
5 to 17	6,397 ±286	16.9% ±0.8	17.0% ±0.1	16.3% ±<0.1
18 to 24	2,871 ±271	7.6% ±0.7	10.0% ±0.1	9.1% ±<0.1
25 to 44	9,570 ±352	25.2% ±0.9	25.1% ±0.1	26.9% ±<0.1
45 to 64	9,656 ±396	25.4% ±1.0	23.9% ±0.1	24.8% ±<0.1
65 and over	7,500 ±428	19.8% ±1.1	18.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $71,311 ±$2,918, and income per person $39,394 ±$1,978, in 2024 dollars. The median is $75,059 ±$418 in Iowa and $80,734 ±$166 in the United States.

Households by income

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Households in Jasper County by income, ACS 2020–2024
Household income	Households	Share	Iowa	United States
Under $25,000	1,999 ±321	13.3% ±2.1	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,995 ±364	20.0% ±2.4	18.5% ±0.3	16.7% ±<0.1
$50,000 to $74,999	3,001 ±334	20.0% ±2.2	17.5% ±0.3	15.5% ±<0.1
$75,000 to $99,999	1,986 ±221	13.2% ±1.5	14.0% ±0.3	12.6% ±<0.1
$100,000 to $149,999	2,726 ±312	18.2% ±2.1	18.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	1,257 ±170	8.4% ±1.1	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	1,046 ±184	7.0% ±1.2	8.6% ±0.2	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 Jasper County by age, ACS 2020–2024
Age	Below poverty	Rate	Iowa	United States
All ages	2,999 ±449	8.3% ±1.2	11.1% ±0.2	12.5% ±0.1
Under 18	892 ±200	10.8% ±2.4	12.9% ±0.3	16.1% ±0.1
18 to 59	1,388 ±241	7.7% ±1.3	11.4% ±0.3	11.6% ±0.1
60 and over	719 ±148	7.3% ±1.5	8.8% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Jasper County, ACS 2020–2024
Measure	Jasper County	Iowa	United States
Housing units	16,249 ±59	1,437,699 ±523	143,775,355 ±10,234
Occupied	92.4% ±1.6	91.5% ±0.3	89.9% ±0.1
Vacant	7.6% ±1.6	8.5% ±0.3	10.1% ±0.1
Owner occupied	72.3% ±2.5	71.7% ±0.3	65.2% ±0.3
Renter occupied	27.7% ±2.5	28.3% ±0.3	34.8% ±0.1
Median home value	$186,300 ±$10,145	$208,000 ±$1,141	$332,700 ±$236
Median gross rent	$836 ±$34	$972 ±$6	$1,413 ±$2
Median year built	1965 ±2	1972 ±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 Jasper County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Iowa	United States
Hispanic or Latino	1,177 ±0	3.1% ±<0.1	7.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	34,444 ±312	90.8% ±0.8	82.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	583 ±131	1.5% ±0.3	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	264 ±71	0.7% ±0.2	2.5% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	5 to 37	< 0.1% to 0.1%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 166	0% to 0.4%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 40	0% to 0.1%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,381 ±364	3.6% ±1.0	3.5% ±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 Jasper County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Iowa	United States
Born in the state	29,914 ±583	78.8% ±1.5	69.6% ±0.2	57.3% ±<0.1
Born in another state	6,637 ±557	17.5% ±1.5	23.8% ±0.2	26.9% ±<0.1
Born a citizen outside the states	138 to 562	0.4% to 1.5%	0.7% ±<0.1	1.7% ±<0.1
Born abroad	1,053 ±269	2.8% ±0.7	5.9% ±0.1	14.1% ±<0.1
Naturalized citizens	183 ±86	0.5% ±0.2	2.6% ±0.1	7.4% ±<0.1
Not citizens	870 ±263	2.3% ±0.7	3.3% ±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%.

Jasper County among the counties of Iowa

16th of 99 by population, July 2025. Every one is listed on the Iowa page.

Counties of Iowa near Jasper County in population, July 2025
County	July 2025	Change since 2020
Warren County	57,331	+9.0%
Clinton County	46,002	−0.9%
Cerro Gordo County	42,372	−1.5%
Muscatine County	41,853	−3.0%
Marshall County	39,890	−0.5%
Jasper County	38,153	+0.9%
Des Moines County	38,077	−2.0%
Webster County	36,838	−0.4%
Sioux County	36,774	+2.5%
Wapello County	35,210	−0.4%
Marion County	34,192	+2.3%

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