Demographics of Butler County, Iowa

Butler County, Iowa had 14,049 people on July 1, 2025, by the Census Bureau’s estimate: −288 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.

Butler County, in four figures

14,049
Population: July 1, 2025, Vintage 2025 estimate.; −2.0%
Change since July 2020: −288 people.; 43.7 ±0.3
Median age: ACS 2020–⁠2024.; $73,715 ±$2,576
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.

Butler County, Iowa's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Butler 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).

Source: The Census Bureau

About this chart

The figures

Butler County, Iowa's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Butler 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	14,337	100.0	100.0
2021	14,357	100.1	100.2
2022	14,258	99.4	100.7
2023	14,190	99.0	101.6
2024	14,093	98.3	102.5
2025	14,049	98.0	103.1

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Population of Butler 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	14,337	−1	+4	0	−7
2021	14,357	+20	−68	+5	+73
2022	14,258	−99	−29	+9	−76
2023	14,190	−68	−44	+18	−39
2024	14,093	−97	−45	+19	−69
2025	14,049	−44	−52	+18	−10

Age, 2020–2024

The median age is 43.7 ±0.3: for men 42.4 ±0.6 and for women 44.9 ±0.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Butler County by age, ACS 2020–2024
Age	People	Share	Iowa	United States
Under 5	737 ±35	5.2% ±0.2	5.9% ±<0.1	5.6% ±<0.1
5 to 17	2,456 ±136	17.2% ±1.0	17.0% ±0.1	16.3% ±<0.1
18 to 24	955 ±98	6.7% ±0.7	10.0% ±0.1	9.1% ±<0.1
25 to 44	3,201 ±157	22.4% ±1.1	25.1% ±0.1	26.9% ±<0.1
45 to 64	3,613 ±177	25.3% ±1.2	23.9% ±0.1	24.8% ±<0.1
65 and over	3,306 ±181	23.2% ±1.3	18.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $73,715 ±$2,576, and income per person $37,766 ±$1,670, 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 Butler County by income, ACS 2020–2024
Household income	Households	Share	Iowa	United States
Under $25,000	657 ±103	11.2% ±1.7	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	1,084 ±132	18.5% ±2.2	18.5% ±0.3	16.7% ±<0.1
$50,000 to $74,999	1,263 ±149	21.5% ±2.5	17.5% ±0.3	15.5% ±<0.1
$75,000 to $99,999	904 ±120	15.4% ±2.0	14.0% ±0.3	12.6% ±<0.1
$100,000 to $149,999	1,134 ±144	19.3% ±2.4	18.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	473 ±90	8.1% ±1.5	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	348 ±82	5.9% ±1.4	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 Butler County by age, ACS 2020–2024
Age	Below poverty	Rate	Iowa	United States
All ages	1,295 ±232	9.2% ±1.7	11.1% ±0.2	12.5% ±0.1
Under 18	318 ±97	10.0% ±3.0	12.9% ±0.3	16.1% ±0.1
18 to 59	663 ±124	10.0% ±1.8	11.4% ±0.3	11.6% ±0.1
60 and over	314 ±75	7.4% ±1.7	8.8% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Butler County, ACS 2020–2024
Measure	Butler County	Iowa	United States
Housing units	6,570 ±33	1,437,699 ±523	143,775,355 ±10,234
Occupied	89.2% ±2.0	91.5% ±0.3	89.9% ±0.1
Vacant	10.8% ±1.9	8.5% ±0.3	10.1% ±0.1
Owner occupied	84.1% ±1.5	71.7% ±0.3	65.2% ±0.3
Renter occupied	15.9% ±1.8	28.3% ±0.3	34.8% ±0.1
Median home value	$165,400 ±$5,861	$208,000 ±$1,141	$332,700 ±$236
Median gross rent	$812 ±$73	$972 ±$6	$1,413 ±$2
Median year built	1958 ±3	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 Butler County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Iowa	United States
Hispanic or Latino	249 ±0	1.7% ±<0.1	7.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	13,493 ±69	94.6% ±0.5	82.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 49	0% to 0.3%	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	179 ±34	1.3% ±0.2	2.5% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 11	0% to 0.1%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 16	0% to 0.1%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	30 to 158	0.2% to 1.1%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	225 ±62	1.6% ±0.4	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 Butler County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Iowa	United States
Born in the state	12,398 ±189	86.9% ±1.3	69.6% ±0.2	57.3% ±<0.1
Born in another state	1,512 ±175	10.6% ±1.2	23.8% ±0.2	26.9% ±<0.1
Born a citizen outside the states	10 to 60	0.1% to 0.4%	0.7% ±<0.1	1.7% ±<0.1
Born abroad	323 ±84	2.3% ±0.6	5.9% ±0.1	14.1% ±<0.1
Naturalized citizens	151 ±56	1.1% ±0.4	2.6% ±0.1	7.4% ±<0.1
Not citizens	84 to 260	0.6% to 1.8%	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%.

Butler County among the counties of Iowa

57th of 99 by population, July 2025. Every one is listed on the Iowa page.

Counties of Iowa near Butler County in population, July 2025
County	July 2025	Change since 2020
Mills County	14,793	+2.6%
Harrison County	14,623	+0.4%
Kossuth County	14,322	−3.2%
Allamakee County	14,238	+1.2%
O'Brien County	14,220	+0.5%
Butler County	14,049	−2.0%
Cass County	12,960	−1.2%
Wright County	12,801	−0.9%
Grundy County	12,361	+0.2%
Lyon County	12,354	+3.6%
Appanoose County	12,077	−1.7%

Elsewhere on the site

Rankings this appears in

No. 35 Counties by homeownership rate
No. 57 Counties by population in Iowa
No. 71 Counties by population growth in Iowa

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

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026