Sioux County, Iowa Population 2021

Sioux County, Iowa's estimated population is 34,961 with a growth rate of 0.15% in the past year according to the most recent United States census data. Sioux County, Iowa is the 21st largest county inIowa. The 2010 Population was 33,754 and has seen a growth of 3.58% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202134,961530.15%
202034,908530.15%
201934,855530.15%
201834,802210.06%
201734,781-163-0.47%
201634,9441900.55%
201534,7541190.34%
201434,6351320.38%
201334,5032210.64%
201234,2822660.78%
201134,0162620.78%
201033,7543,85112.88%
199029,903-910-2.95%
198030,8132,81710.06%
197027,9961,6216.15%
196026,375-6-0.02%
195026,381-828-3.04%
194027,2094031.50%
193026,8063481.32%
192026,4581,2104.79%
191025,2481,9118.19%
190023,3374,96727.04%
189018,37012,944238.56%
18805,4264,850842.01%
18705765665660.00%
1860100.00%
2021 Growth Rate
0.15% (53)
County Website
State
Founded
1851
County Seat
2010 Population
33,754
Growth Since 2010
3.58% (1,207)
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Sioux County, Iowa Population Growth

Population by Race

Race Population Percentage
White32,93094.55%
Some Other Race8132.33%
Two or More Races5951.71%
Asian2570.74%
Black or African American1220.35%
American Indian and Alaska Native940.27%
Native Hawaiian and Other Pacific Islander160.05%
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Sioux County, Iowa Population by Race

Sioux County, Iowa Population Pyramid $2021

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Sioux County, Iowa Median Age

33.4


Total

32.4


Male

34.7


Female

Sioux County, Iowa Adults

There are 25,395 adults, (5,301 of whom are seniors) in Sioux County, Iowa.

Sioux County, Iowa Age Dependency

73.3

Age Dependency Ratio

26.4

Old Age Dependency Ratio

46.9

Child Dependency Ratio

Sioux County, Iowa Sex Ratio

Female

17,342

49.79%

Male

17,485

50.21%

Sioux County, Iowa Population by Age

Sioux County, Iowa Renter vs Owner Occupied by Household Type

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Sioux County, Iowa Household Types

Type Owner Renter
Female57.9%42.1%
Non Family60.6%39.4%
Male75.7%24.3%
All80.3%19.7%
Married89.7%10.3%

80.3%

Rate of Home Ownership

Sioux County, Iowa Households and Families

Type Count Average Size Owned
All12,2482.6680.3
Married8,1683.289.7
Non Family3,2201.2260.6
Female4892.7957.9
Male3713.2375.7

3.15

Average Family Size

2.66

Average Household Size

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Sioux County, Iowa Households by Type

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Education Attained Count Percentage
Less Than 9th Grade9144.41%
9th to 12th Grade1,1085.35%
High School Graduate6,25430.18%
Some College3,71017.90%
Associates Degree2,70913.07%
Bachelors Degree4,17320.14%
Graduate Degree1,8578.96%
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Sioux County, Iowa Educational Attainment by Sex (over 25)

Sioux County, Iowa Educational Attainment by Race

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Race Total High School Bachelors
White18,82017,7565,813
Hispanic1,61767147
Other Race422202
2+ Races1747459
Asian10710772
Black676130
Native American5720
Islander131313

The highest rate of high school graduation is among asian people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 100.00%.

Sioux County, Iowa Educational Attainment by Race

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Name Average Male Female
Overall$40,253$50,104$26,908
Less Than 9th Grade$30,622$31,844$21,058
High School Graduate$31,367$44,654$21,589
Some College$39,375$53,051$25,232
Bachelors Degree$44,362$57,036$32,564
Graduate Degree$59,281$69,767$51,270

$40,253

Average Earnings

$50,104

Average Male

$26,908

Average Female

Sioux County, Iowa Earnings by Educational Attainment

Sioux County, Iowa Language by Age

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Sioux County, Iowa Language

90.95% of Sioux County, Iowa residents speak only English, while 9.05% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.04% of the population.

Sioux County, Iowa Language

Sioux County, Iowa Poverty by Race

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Name Total In Poverty Poverty Rate
White28,2351,1484.07%
Hispanic3,61883923.19%
Other79818322.93%
Multiple544407.35%
Asian204209.80%

6.30%

Overall Poverty Rate

5.06%

Male Poverty Rate

7.53%

Female Poverty Rate

Poverty in Sioux County, Iowa

The race most likely to be in poverty in Sioux County, Iowa is Hispanic, with 23.19% below the poverty level.

The race least likely to be in poverty in Sioux County, Iowa is White, with 4.07% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.54%. Among those working part-time, it was 8.57%, and for those that did not work, the poverty rate was 12.73%.

Sioux County, Iowa Poverty

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Name Poverty
Less Than 9th Grade20.35%
High School6.15%
Some College3.36%
Bachelors or Greater1.13%

Sioux County, Iowa Poverty Rate by Education

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Rate Poverty
Female Unemployed22.46%
Male Unemployed19.89%
Male Employed3.57%
Female Employed3.50%

Sioux County, Iowa Poverty Rate by Employment Status and Sex

Sioux County, Iowa Income by Household Type

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Name Median Mean
Households$69,844$82,322
Families$81,043$94,746
Married Families$85,628-
Non Families$37,167$46,442
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Income by Household Type

Sioux County, Iowa Marital Status

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Marriage Rates

63.0%

Overall Marriage Rate

62.8%

Male Marriage Rate

63.2%

Female Marriage Rate

Sioux County, Iowa Married by Age and Sex

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Sioux County, Iowa Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Sioux County, Iowa Marital Status by Race

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Sioux County, Iowa Marital Status

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1,454

Number of Veterans

1,408

Male Veterans

46

Female Veterans

War Veterans
Vietnam694
First Gulf War243
Second Gulf War189
Korea159
World War II83

Sioux County, Iowa Veterans by War

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Age Group Veterans
65 to 74521
75+483
35 to 54224
55 to 64159
18 to 3467

Sioux County, Iowa Veterans by Age

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Name Veterans % of Total
White1,4485.99%
Hispanic110.54%
Black66.74%

Sioux County, Iowa Veterans by Race

Sioux County, Iowa Veterans by Education

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4.66%

Veteran Poverty Rate

25.87%

Veteran Disability Rate

Sioux County, Iowa Veterans by Education

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73.3%

Labor Force Participation

71.2%

Employment Rate

2.7%

Unemployment Rate

Sioux County, Iowa Employment by Age

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Sioux County, Iowa Employment by Race

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Sioux County, Iowa Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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67.18%

Born in Sioux County, Iowa

94.09%

Native Born

5.91%

Foreign Born

4.33%

Non Citizen

1.58%

Naturalized

Place of Birth

94.09% of Sioux County, Iowa residents were born in the United States, with 67.18% having been born in Iowa. 4.33% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Sioux County, Iowa Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources