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COUNTY

Sioux County

Iowa · 36,774 residents (2025 est.) · 768 sq mi
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The short version

Sioux County is a county of 36,212 people in Iowa. Few US counties rank higher on income. This skews young, with a median age of 33.8. Getting to work takes 13 minutes on average. 76% of homes are owner-occupied. There are 47 people per square mile.

At a glance
Average income
near the US median
US median: $82,259
Younger
median age 33.8
US median: 38.9
Average education
31% hold a bachelor's degree
US average: 36%
Less affordable
home values up 61%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
36,212
+15%since 2000
from 31,589 in 2000
36,774 in 2025 (Census Bureau estimate)
1990 – 2025
Population density
47 / sq mi
+13%since 2009
from 42 / sq mi in 2009
US average: 281
Median age
33.8
+3%since 2000
from 32.8 in 2000
US average: 38.9
Land area
768 sq mi
Population, 1990 – 2024
29K31K33K35K37K19902000201020202024Sioux County
202436K
1990201020202024
Age distribution, 2024
Under 57.1%(2,579)
US avg: 5.6%
5 to 98%(2,890)
US avg: 6%
10 to 147.1%(2,587)
US avg: 6.4%
15 to 199.3%(3,372)
US avg: 6.6%
20 to 249.1%(3,298)
US avg: 6.5%
25 to 3410.5%(3,817)
US avg: 13.7%
35 to 4411.4%(4,115)
US avg: 13.2%
45 to 5410.3%(3,727)
US avg: 12.2%
55 to 6410.9%(3,961)
US avg: 12.7%
65 to 748.7%(3,160)
US avg: 10.2%
75 to 845.5%(1,982)
US avg: 5.1%
85 and over2%(724)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$86,098
+17%inflation adjusted, since 2000
from $40,536 in 2000
US average: $82,259
1990 – 2024
Per capita income
$37,166
+125%since 2000
from $16,532 in 2000
US average: $44,673
Households earning $100K+
58.2%
+34.2 ptssince 2009
from 24.0% in 2009
US average: 53.3%
Poverty rate
6.7%
+0.2 ptssince 2000
from 6.4% in 2000
US average: 12.5%
Income inequality (Gini)
0.409
+7%since 2010
from 0.383 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade16.9%
US avg: 9.9%
Agriculture, forestry, fishing9.5%
US avg: 1.6%
Construction9.3%
US avg: 1.2%
Wholesale trade8.7%
US avg: 6.9%
Information8.6%
US avg: 10.8%
Other services4.7%
US avg: 6.7%
Public administration3.9%
US avg: 4.8%
Finance & insurance3.7%
US avg: 5.9%
Professional, scientific, technical3.3%
US avg: 5.1%
Transportation & warehousing2.8%
US avg: 2.2%
Arts, entertainment, food1.2%
US avg: 1.9%
Education & health services0.3%
US avg: 0.9%
Manufacturing0.1%
US avg: 0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$250,100
+61%inflation adjusted, since 2000
from $85,400 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$908
+29%inflation adjusted, since 2000
from $385 in 2000
US average: $1,442
Owner-occupied
76.1%
−4.3 ptssince 2000
from 80.5% in 2000
23.9% rent
Vacancy rate
4.5%
−1.8 ptssince 2009
from 6.3% in 2009
US average: 10.0%
Persons per household
2.67 people
Unchangedsince 2009
from 2.66 people in 2009
US average: 2.54
Owner cost-burdened
15.3%
−0.5 ptssince 2009
from 15.8% in 2009
US average: 22.9%
Renter cost-burdened
26.3%
−2.6 ptssince 2009
from 28.9% in 2009
US average: 47.4%
Afford Score
2.9
+27%since 2009
from 2.3 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Gentrification Score
82
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04

Race & ethnicity

2000
White, non-Hispanic96.2%(30,374)
Black0.2%(57)
Hispanic / Latino2.6%(808)
Asian0.6%(185)
Other0%
2024
White, non-Hispanic82.8%(29,982)
Black0.6%(214)
Hispanic / Latino14.3%(5,193)
Asian0.5%(197)
Other1.7%(626)
Diversity Score
37
+121%since 2009
from 17 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
20
−17%since 2020
from 24 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican10.9%(3,942)
Guatemalan2.5%(896)
Puerto Rican0.3%(93)
Spaniard0.2%(60)
Honduran0.1%(50)
Salvadoran0.1%(40)
Colombian0.1%(25)
Asian origin
Filipino0.2%(62)
Chinese0.1%(35)
Vietnamese0.1%(23)
Korean0.1%(22)
Asian Indian0.1%(22)
Japanese0%(14)
Pacific Islander origin
Tongan0%(11)
Ancestry
Dutch40.8%(14,759)
German21.5%(7,775)
American6.1%(2,210)
Irish4.5%(1,625)
English3.5%(1,251)
Norwegian2.3%(815)
French1.2%(433)
Swedish1.2%(430)
Czech0.5%(193)
Danish0.5%(183)
Scotch-Irish0.4%(146)
+ 22 more ancestry groups with data
Scottish0.4%(140)
Swiss0.4%(128)
Italian0.3%(124)
Polish0.2%(87)
Canadian0.1%(53)
Welsh0.1%(49)
British0.1%(38)
Austrian0.1%(21)
Russian0%(16)
Finnish0%(12)
Slovene0%(9)
Arab0%(5)
Greek0%(4)
Haitian0%(4)
Serbian0%(1)
Section 05

Education

Bachelor's degree or higher
30.6%
+10.8 ptssince 2000
from 19.8% in 2000
US average: 35.6%
High school or higher
90.9%
+10.5 ptssince 2000
from 80.4% in 2000
US average: 89.6%
Graduate degree
8.3%
+1.9 ptssince 2000
from 6.4% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
13.5 min
+27%since 2000
from 10.6 min in 2000
US average: 26.5
Drive alone to work
76.0%
+6.4 ptssince 2009
from 69.6% in 2009
US average: 68.9%
Carpooled to work
6.0%
−3.0 ptssince 2009
from 9.0% in 2009
US average: 8.5%
Public transit
0.3%
Unchangedsince 2009
from 0.3% in 2009
US average: 3.2%
Worked from home
12.8%
−0.6 ptssince 2009
from 13.4% in 2009
US average: 15.0%
Walked to work
3.4%
−2.4 ptssince 2009
from 5.8% in 2009
US average: 2.4%
Biked to work
0.6%
−0.6 ptssince 2009
from 1.2% in 2009
US average: 0.4%
No vehicle available
2.9%
−1.1 ptssince 2009
from 4.0% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
1.5%
−0.8 ptssince 2011
from 2.4% in 2011
US average: 5.2%
Labor force participation
70.3%
−2.6 ptssince 2011
from 72.9% in 2011
US average: 63.5%
Women 20-64 in the labor force
81.6%
−0.7 ptssince 2020
from 82.3% in 2020
US average: 74.6%
Self-employed
11.7%
+0.2 ptssince 2009
from 11.5% in 2009
US average: 13.1%
Management & professional
38.2%
+6.8 ptssince 2009
from 31.5% in 2009
US average: 42.5%
Section 08

People & community

Male
50.6%
+0.9 ptssince 2009
from 49.6% in 2009
Female
49.4%
−0.9 ptssince 2009
from 50.4% in 2009
Foreign born
8.5%
+4.2 ptssince 2009
from 4.4% in 2009
US average: 14.1%
Veterans
3.7%
−4.3 ptssince 2009
from 8.0% in 2009
US average: 6.2%
With a disability
9.0%
+2.2 ptssince 2012
from 6.8% in 2012
US average: 13.3%
Uninsured
5.8%
−2.0 ptssince 2013
from 7.8% in 2013
US average: 8.4%
Broadband at home
92.4%
+10.5 ptssince 2017
from 81.9% in 2017
US average: 91.0%
Computer in household
95.2%
+2.2 ptssince 2020
from 93.0% in 2020
US average: 95.5%
Same house as last year
90.6%
+1.1 ptssince 2020
from 89.5% in 2020
US average: 87.7%
English only at home
87.5%
−2.7 ptssince 2016
from 90.3% in 2016
US average: 77.7%
Spanish at home
11.1%
+2.6 ptssince 2016
from 8.5% in 2016
US average: 13.6%
Marital status
Men 15+
Never married31.8%(4,497)
Married62.7%(8,880)
Widowed1.7%(246)
Divorced3.8%(537)
Women 15+
Never married25.3%(3,545)
Married62.1%(8,686)
Widowed6.9%(970)
Divorced5.7%(795)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Uninsured
5.8%
−2.0 ptssince 2013
from 7.8% in 2013
US average: 8.4%
Employer-based
58.2%
−2.7 ptssince 2020
from 60.9% in 2020
US average: 54.8%
Direct-purchase
18.2%
−2.3 ptssince 2020
from 20.5% in 2020
US average: 13.8%
Medicare
16.6%
+0.9 ptssince 2020
from 15.7% in 2020
US average: 18.4%
Medicaid
16.6%
+1.5 ptssince 2020
from 15.1% in 2020
US average: 20.9%
VA health care
1.4%
−0.6 ptssince 2020
from 2.0% in 2020
US average: 2.2%
Any private
74.9%
−4.4 ptssince 2020
from 79.3% in 2020
US average: 67.1%
Any public
31.2%
+2.0 ptssince 2020
from 29.2% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)13.5%(130)
US avg: 26.4%
Gulf War (1990s)10.7%(103)
US avg: 24.3%
Vietnam era50.3%(486)
US avg: 33.1%
Korean War8.7%(84)
US avg: 4.5%
World War II0%(0)
US avg: 1%

Share of the 966 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

Places similar to Sioux County

Clinton County
Pop 37,128
Jefferson County
Pop 35,297
Wakulla County
Pop 38,089
Lee County
Pop 34,179
Places similar to Sioux County
Head to head

Compare Sioux County to nearby counties

SIOUX COUNTY VS
Lyon County
Income$76,746−11%
Home value$230,000−8%
Population12,354−66%
SEE FULL COMPARISON →
SIOUX COUNTY VS
Plymouth County
Income$83,251−3%
Home value$228,900−8%
Population25,697−30%
SEE FULL COMPARISON →
SIOUX COUNTY VS
O'Brien County
Income$68,356−21%
Home value$173,100−31%
Population14,220−61%
SEE FULL COMPARISON →
SIOUX COUNTY VS
Union County
Income$89,636+4%
Home value$301,100+20%
Population17,402−53%
SEE FULL COMPARISON →
Frequently asked

How many people live in Sioux County, Iowa?

Sioux County, Iowa has about 36,212 residents according to the 2024 American Community Survey.

What is the median household income in Sioux County, Iowa?

The typical household in Sioux County, Iowa earns about $86,098 a year. Half of households make more than that, and half make less.

Is Sioux County, Iowa expensive?

In Sioux County, Iowa, the median home is worth about $250,100, and the typical rent is about $908 a month.

How educated are people in Sioux County, Iowa?

About 30.6% of adults age 25 and over in Sioux County, Iowa hold a bachelor's degree or higher.

What is the poverty rate in Sioux County, Iowa?

About 6.7% of people in Sioux County, Iowa live below the federal poverty line.

Has Sioux County, Iowa grown since 1990?

Yes, Sioux County, Iowa has grown since 1990. The population has added about 6,309 residents, a change of about 21 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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