Sac County, Iowa Demographics

Population trends, housing costs, income, commuting, and health, all on one page.

Sac County, IA Population Density Map and Area Scores

Area Score

Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.

  • B
    Health Around average
  • B
    Income Around average
    Wealthier than 79% of counties in Iowa
  • D
    Education Well below average

Source: Map AI Methodology

Sac County
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Population density, people per sq mi

Population: density and quick facts

Metric Sac County Iowa Avg U.S. Average
Population 9,689 3,204,793 337,468,954
Population density (per sq mi) 16.8 57.0 86.4
Population growth (%/yr) -0.43% 0.41% 0.59%
Median age 46.9 36.8 37.3
Households 4,302 1,308,457 130,235,071

Population in Sac County grew by 26.8% from 2009 to 2024, reaching 9,689 in 2024.

Population Growth 2009–2024

Year Sac County

Race & Ethnicity

Group Share

Age & Sex

The largest generation in Sac County is Boomers, aged 61–79, at 21.6% of residents. That is 3.9 points above Iowa as a whole.

Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Iowa, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.

Male and female share

Women are 50.3% of the people living in Sac County and men 49.7%.

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9,689

100% of everyone living in Sac County

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Economy

Sac County has a the economy index of B, which means it is quite prosperous.

Metric Sac County Iowa Avg U.S. Average
Median household income $73,798 $75,133 $80,455
Income growth (%/yr) 5.18% 3.99% 4.80%
Unemployment rate 4.4% 3.6% 5.2%

The median household income in Sac County is about 2% lower than in Iowa.

Detailed wealth and income breakdown →

Housing

Metric Sac County Iowa Avg U.S. Average
Median home price $78,333 $153,425 $248,835
Median rent $721 $971 $1,407
Homeownership rate 78.0% 71.7% 65.2%

The median home price in Sac County is about 9.0 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $721 per month for that long.

Full housing market analysis →

Commute Time & Mobility

Commuters in Sac County spend about 36 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 151 hours, about 6.3 full days, spent commuting.

Metric Sac County Iowa Avg U.S. Average
One-way commute (min) 18.1 17.0 22.4
Round-trip commute (min) 36.3 33.9 44.8
Yearly time spent (hours) 151 141 187
Estimated yearly cost $4,687 $4,382 $5,790
Work from home 4.7% 11.3% 15.0%
Highway traffic (vehicles/day) 1,971 4,993 8,813
Local road traffic (vehicles/day) 283 606 1,355

Fastest commutes among counties in Iowa: Sioux County (10.1 min), Union County (10.4 min), Cass County (10.6 min).
Slowest: Monroe County (30.4 min), Madison County (30.1 min), Mills County (26.7 min).

The average commute time in Sac County is 18 minutes, longer than the 17 minutes in Iowa.

Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.

Commute and transport details →

Education & Households

Sac County has a education index of D, which means it is barely educated.

Metric Sac County Iowa Avg U.S. Average
Bachelor's degree or higher 20.6% 27.9% 31.6%
Average household size 2.21 2.37 2.53

Highest education index among counties in Iowa: Johnson County (0.4), Dallas County (0.4), Story County (0.4).
Lowest: Crawford County (0.2), Wayne County (0.2), Louisa County (0.2).

Health

Sac County has a health index of B, which means it is quite healthy.

Metric Sac County Iowa Avg U.S. Average
Life expectancy (years) 79.7 79.2 78.3
Self-rated poor health 13.7% 13.6% 16.3%
Smokers 16.8% 17.6% 19.0%

Highest health index among counties in Iowa: Johnson County (0.8), Story County (0.8), Winneshiek County (0.8).
Lowest: Davis County (0.8), Wayne County (0.8), Appanoose County (0.8).

Full health data →

Sac County, IA Compared With Nearby Counties

How Sac County, IA compares with the 2 counties closest to it.

Area Population Median household income Median home price Commute
Sac County, IA 9,689 $73,798 #1/3 $78,333 #3/3 18.1 min #3/3
Buena Vista County, IA 20,753 $72,416 $319,753 11.1 min
Carroll County, IA 20,594 $71,378 $167,460 10.8 min

Frequently Asked Questions

Common questions about Sac County, Iowa.

What is the population of Sac County, Iowa?

About 9,689 people live in Sac County, Iowa, in 4,302 households of 2.2 people on average. The median age is 46.9, so residents are older than the U.S. median of 37.3 by about 10 years.

Is Sac County, Iowa mostly urban or rural?

Averaged over its land area, Sac County, Iowa has 17 people per square mile, a density typical of rural areas. That is about 19% of the U.S. average of 86.

How affordable is housing in Sac County, Iowa?

The median home costs 1.1 times the median household income ($78,333 against $73,798), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $721 a month takes about 12% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.

How educated are people in Sac County, Iowa?

20.6% of adults in Sac County, Iowa hold a bachelor's degree or higher (about 1 in 5), well below the U.S. share of 31.6%.

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