Demographics of Sac County, Iowa

Sac County, Iowa had 9,525 people on July 1, 2025, by the Census Bureau’s estimate: −266 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.

Sac County, in four figures

9,525
Population: July 1, 2025, Vintage 2025 estimate.; −2.7%
Change since July 2020: −266 people.; 46.2 ±0.7
Median age: ACS 2020–⁠2024.; $73,838 ±$5,248
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.

Sac County, Iowa's population shrank 2.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Sac 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

Sac County, Iowa's population shrank 2.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sac 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	9,791	100.0	100.0
2021	9,766	99.7	100.2
2022	9,675	98.8	100.7
2023	9,696	99.0	101.6
2024	9,614	98.2	102.5
2025	9,525	97.3	103.1

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Population of Sac 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	9,791	−23	−10	0	−13
2021	9,766	−25	−33	0	+4
2022	9,675	−91	−60	+4	−31
2023	9,696	+21	−18	+11	+30
2024	9,614	−82	+1	+7	−91
2025	9,525	−89	−5	+6	−89

Age, 2020–2024

The median age is 46.2 ±0.7: for men 45.1 ±1.9 and for women 46.8 ±1.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Sac County by age, ACS 2020–2024
Age	People	Share	Iowa	United States
Under 5	541 ±23	5.6% ±0.2	5.9% ±<0.1	5.6% ±<0.1
5 to 17	1,564 ±94	16.1% ±1.0	17.0% ±0.1	16.3% ±<0.1
18 to 24	658 ±110	6.8% ±1.1	10.0% ±0.1	9.1% ±<0.1
25 to 44	1,962 ±107	20.2% ±1.1	25.1% ±0.1	26.9% ±<0.1
45 to 64	2,613 ±150	27.0% ±1.6	23.9% ±0.1	24.8% ±<0.1
65 and over	2,351 ±171	24.3% ±1.8	18.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $73,838 ±$5,248, and income per person $40,084 ±$2,139, 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 Sac County by income, ACS 2020–2024
Household income	Households	Share	Iowa	United States
Under $25,000	719 ±130	16.7% ±3.0	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	622 ±97	14.5% ±2.2	18.5% ±0.3	16.7% ±<0.1
$50,000 to $74,999	843 ±113	19.6% ±2.6	17.5% ±0.3	15.5% ±<0.1
$75,000 to $99,999	685 ±99	15.9% ±2.3	14.0% ±0.3	12.6% ±<0.1
$100,000 to $149,999	963 ±134	22.4% ±3.1	18.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	276 ±63	6.4% ±1.5	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	194 ±51	4.5% ±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 Sac County by age, ACS 2020–2024
Age	Below poverty	Rate	Iowa	United States
All ages	873 ±193	9.2% ±2.0	11.1% ±0.2	12.5% ±0.1
Under 18	276 ±104	13.2% ±4.9	12.9% ±0.3	16.1% ±0.1
18 to 59	314 ±94	7.0% ±2.1	11.4% ±0.3	11.6% ±0.1
60 and over	283 ±78	9.6% ±2.6	8.8% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Sac County, ACS 2020–2024
Measure	Sac County	Iowa	United States
Housing units	5,118 ±27	1,437,699 ±523	143,775,355 ±10,234
Occupied	84.1% ±2.1	91.5% ±0.3	89.9% ±0.1
Vacant	15.9% ±2.1	8.5% ±0.3	10.1% ±0.1
Owner occupied	78.0% ±2.5	71.7% ±0.3	65.2% ±0.3
Renter occupied	22.0% ±3.2	28.3% ±0.3	34.8% ±0.1
Median home value	$141,400 ±$11,933	$208,000 ±$1,141	$332,700 ±$236
Median gross rent	$722 ±$73	$972 ±$6	$1,413 ±$2
Median year built	1957 ±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 Sac County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Iowa	United States
Hispanic or Latino	422 ±0	4.4% ±<0.1	7.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	8,899 ±52	91.8% ±0.5	82.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 101	0% to 1.0%	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	2 to 68	< 0.1% to 0.7%	2.5% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 18	0% to 0.2%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 43	0% to 0.4%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 64	0% to 0.7%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	237 ±107	2.4% ±1.1	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 Sac County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Iowa	United States
Born in the state	7,891 ±179	81.4% ±1.8	69.6% ±0.2	57.3% ±<0.1
Born in another state	1,522 ±170	15.7% ±1.8	23.8% ±0.2	26.9% ±<0.1
Born a citizen outside the states	18 to 78	0.2% to 0.8%	0.7% ±<0.1	1.7% ±<0.1
Born abroad	228 ±86	2.4% ±0.9	5.9% ±0.1	14.1% ±<0.1
Naturalized citizens	23 to 121	0.2% to 1.2%	2.6% ±0.1	7.4% ±<0.1
Not citizens	156 ±64	1.6% ±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%.

Sac County among the counties of Iowa

77th of 99 by population, July 2025. Every one is listed on the Iowa page.

Counties of Iowa near Sac County in population, July 2025
County	July 2025	Change since 2020
Montgomery County	10,002	−3.2%
Franklin County	9,868	−1.2%
Keokuk County	9,797	−2.0%
Clarke County	9,574	−1.6%
Calhoun County	9,562	−3.4%
Sac County	9,525	−2.7%
Howard County	9,415	−0.8%
Humboldt County	9,409	−2.0%
Davis County	9,230	+1.3%
Emmet County	9,107	−2.5%
Palo Alto County	8,899	−1.0%

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