Sioux County, Iowa Population 2020

Sioux County, Iowa's estimated population is 34,841 with a growth rate of -0.35% in the past year according to the most recent United States census data. Sioux County, Iowa is the 20th largest county in Iowa.

Year Population Growth Growth Rate
201834,909680.20%
201734,841-124-0.35%
201634,9651960.56%
201534,7691280.37%
201434,6411320.38%
201334,5092280.67%
201234,2812670.78%
201134,0142610.77%
201033,7533,85012.87%
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%

How Many People Live in Sioux County, Iowa?

34,841

Sioux County, Iowa Population Growth

Population by Race

Race Population Percentage
White32,47493.25%
Some Other Race1,2643.63%
Two or More Races5911.70%
Asian2480.71%
Black or African American1240.36%
American Indian and Alaska Native1040.30%
Native Hawaiian and Other Pacific Islander200.06%

Sioux County, Iowa Population Pyramid 2020

Sioux County, Iowa Median Age

33.2


Total

32.5


Male

34.3


Female

Sioux County, Iowa Adults

There are 25,377 adults, (5,184 of whom are seniors) in Sioux County, Iowa.

Sioux County, Iowa Age Dependency

72.5

Age Dependency Ratio

25.7

Old Age Dependency Ratio

46.8

Child Dependency Ratio

Sioux County, Iowa Sex Ratio

Female

17,338

49.79%

Male

17,487

50.21%

Sioux County, Iowa Households and Families

Sioux County, Iowa Renter vs Owner Occupied by Household Type

Sioux County, Iowa Household Types

Type Owner Renter
Married90.1%9.9%
All79.8%20.2%
Male72.9%27.1%
Non Family59.4%40.6%
Female57.5%42.5%

79.8%

Rate of Home Ownership

Type Count Average Size Owned
All12,1662.6779.8
Married7,9403.290.1
Non Family3,2501.2259.4
Female5633.0857.5
Male4133.3272.9

3.17

Average Family Size

2.67

Average Household Size

2.7%

Unmarried (Opposite Sex)

0.1%

Unmarried (Same Sex)

Sioux County, Iowa Education

Education Attained Count Percentage
Less Than 9th Grade1,0495.10%
9th to 12th Grade8364.06%
High School Graduate6,45031.36%
Some College3,87918.86%
Associates Degree2,57012.49%
Bachelors Degree4,05419.71%
Graduate Degree1,7318.42%

Sioux County, Iowa Educational Attainment by Race

Name Total High School Bachelors
White18,77517,6795,565
Hispanic1,51473657
Other Race678337
Multiple Races13011374
Asian929255
Black676124
Native American6621
Islander161616

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%.

Name Average Male Female
Overall$38,853$49,298$25,805
Less Than High School$27,059$31,372$18,442
High School Grad$30,642$42,926$20,915
Some College$39,005$53,054$26,426
Bachelors Degree$42,217$55,326$30,819
Graduate Degree$60,298$70,275$50,475

$38,853

Average Earnings

$49,298

Average Male

$25,805

Average Female

Sioux County, Iowa Language

Sioux County, Iowa Language by Age

Sioux County, Iowa Language

90.28% of Sioux County, Iowa residents speak only English, while 9.72% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.53% of the population.

Sioux County, Iowa Poverty

Sioux County, Iowa Poverty by Race

Name Total In Poverty Poverty Rate
White28,2241,1424.05%
Hispanic3,4951,00028.61%
Other1,21642935.28%
Multiple534417.68%
Asian1982211.11%
Black77911.69%

6.83%

Overall Poverty Rate

5.94%

Male Poverty Rate

7.74%

Female Poverty Rate

Poverty in Sioux County, Iowa

The race most likely to be in poverty in Sioux County, Iowa is Other, with 35.28% below the poverty level.

The race least likely to be in poverty in Sioux County, Iowa is White, with 4.05% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.61%. Among those working part-time, it was 8.76%, and for those that did not work, the poverty rate was 13.80%.

Name Poverty
Less Than High School18.63%
High School7.72%
Some College3.72%
Bachelors or Greater0.66%
Name Poverty
Female Unemployed23.81%
Male Unemployed22.15%
Male Employed4.38%
Female Employed3.41%

Sioux County, Iowa Income

Sioux County, Iowa Income by Household Type

Name Median Mean
Households$67,178$79,537
Families$78,579$91,493
Married Families$84,195-
Non Families$38,476$45,598

Sioux County, Iowa Marital Status

Sioux County, Iowa Marital Status

Marriage Rates

61.8%

Overall Marriage Rate

61.2%

Male Marriage Rate

62.4%

Female Marriage Rate

Sioux County, Iowa Married by Age and Sex

Sioux County, Iowa Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Sioux County, Iowa Marital Status by Race

Sioux County, Iowa Veterans

1,404

Number of Veterans

1,354

Male Veterans

50

Female Veterans

War Veterans
Vietnam684
Korea195
First Gulf War178
Second Gulf War100
World War II93

$Sioux County, Iowa Veterans by Education

4.02%

Veteran Poverty Rate

24.73%

Veteran Disability Rate

Sioux County, Iowa Employment Status

73.5%

Labor Force Participation

71.5%

Employment Rate

2.6%

Unemployment Rate

Sioux County, Iowa Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

66.94%

Born in Iowa

93.98%

Native Born

6.02%

Foreign Born

4.24%

Non Citizen

Place of Birth

93.98% of Sioux County, Iowa residents were born in the United States, with 66.94% having been born in Iowa. 4.24% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

  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