Sioux County, IA demographics:
population, income, and more

Total population
36,212
0.6% year-over-year change
Median household income
$86,098/yr
1.6% year-over-year change
Housing units
13,285
0.8% year-over-year change

Sioux County population

How many people live in Sioux County

Sioux County is home to 36,212 residents, according to the most recent Census data. Gender-wise, 50.6% of Sioux County locals are male, and 49.4% are female.

Total population
36,212
0.6% year-over-year change
Gender ratio
Male
50.6%
18,320
Female
49.4%
17,892
Value Percent YoY change
Male 18,320 50.6% 1.5%
Female 17,892 49.4% -0.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Sioux County is 34, with the population distributed as follows: about 22.2% are children under 15, then 18.4% are in the 15 to 24 age group. Adults between 25 and 44 make up 21.9% of the population, while another 21.2% fall into the 45 to 64 bracket. Finally, around 16.2% are 65 or older.

Median age
33.8
Age breakdown
Under 15
22.2%
15 to 24
18.4%
25 to 44
21.9%
45 to 64
21.2%
Over 65
16.2%
Value Percent YoY change
Under 15 8,056 22.2% -0.8%
15 to 24 6,670 18.4% 2.3%
25 to 44 7,932 21.9% -3.5%
45 to 64 7,688 21.2% 4.0%
Over 65 5,866 16.2% 2.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Sioux County, 90.9% of the population are US-born citizens, while 3.7% have gained naturalized citizenship. At the same time, 5.4% of residents are non-citizens. As for race, 85% of locals are Caucasian, 0.6% are African American and 0.5% have Asian roots. There’s also a share of 6.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
90.9%
Non-U.S.-born citizens
3.7%
Non-citizens
5.4%
Value Percent YoY change
U.S.-born citizens 32,915 90.9% -0.4%
Non-U.S.-born citizens 1,343 3.7% 3.7%
Non-citizens 1,954 5.4% 18.4%
Racial breakdown
White
85%
Black or African American
0.6%
American Indian and Alaska Native
0.4%
Asian
0.5%
Native Hawaiian and other Pacific Islander
0%
Two or more races
6.6%
Other
6.9%
Value Percent
White 30,791 85%
Black or African American 214 0.6%
American Indian and Alaska Native 130 0.4%
Asian 197 0.5%
Native Hawaiian and other Pacific Islander 6 0%
Two or more races 2,391 6.6%
Other 2,483 6.9%

Households in Sioux County

A peek inside Sioux County households

Sioux County has 12,690 households, with an average of 3 members in each. Of these, 73.7% are families, while the remaining 26.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
12,690
0.9% year-over-year change
Average people per household
3
Non-family households
3,340
Family households
9,350
Value Percent YoY change
Non-family households 3,340 26.3% 4.0%
Family households 9,350 73.7% -0.2%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Sioux County

The housing landscape of Sioux County

Sioux County's housing consists of 13,285 units, with 79.7% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 4.2% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 1.8% of the housing landscape.

Housing units
13,285
0.8% year-over-year change
Housing types
Value Percent
1 unit, detached 10,590 79.7%
1 unit, attached 557 4.2%
2 units 141 1.1%
3 or 4 units 582 4.4%
5 to 9 units 536 4%
10 to 19 units 336 2.5%
20 to 49 units 258 1.9%
50 or more units 49 0.4%
Mobile home 236 1.8%
Homes built since 2020
204
100.0% year-over-year change

The age of buildings in Sioux County

In Sioux County, the median construction year is 1973. About 21.1% of homes were built before the 1940s, with another 3.9% going up by 1949. Most development happened in the second half of the 20th century. Then, 10.7% of homes were added from 2000 to 2009, 9.8% between 2010 and 2019, and 1.5% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 2,807 21.1% -1.1%
Built between 1940 and 1949 513 3.9% -2.5%
Built between 1950 and 1959 996 7.5% -17.5%
Built between 1960 and 1969 1,571 11.8% 1.4%
Built between 1970 and 1979 2,415 18.2% 5.4%
Built between 1980 and 1989 748 5.6% -2.4%
Built between 1990 and 1999 1,306 9.8% -14.5%
Built between 2000 and 2009 1,421 10.7% 13.2%
Built between 2010 and 2019 1,304 9.8% 17.2%
Built in 2020 or later 204 1.5% 100.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Sioux County occupancy rates

Out of the 12,690 occupied housing units in Sioux County, 76.1% are owner-occupied, while 23.9% are lived in by tenants. Meanwhile, 4.5% of all homes on the local market sit vacant.

Occupied housing units
12,690
0.9% year-over-year change
Occupancy breakdown
Renter occupied
3,029
Owner occupied
9,661
Value Percent YoY
change
Renter occupied 3,029 23.9% 8.6%
Owner occupied 9,661 76.1% -1.3%
Unoccupied housing units
4.5%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Sioux County housing costs

Housing costs in Sioux County come to a median of $997 per month, while tenants specifically pay a median gross rent of $908.

Median housing costs per month
$997/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Sioux County
$908/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Sioux County

Sioux County education at a glance

About 31.3% of the population in Sioux County went to high school, while 23.1% pursued college studies. Another 13.6% earned an associate degree and 20.5% hold a bachelor’s. Meanwhile, 6.8% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 1,253 4.8% 11.5%
High school diploma 8,263 31.3% 0.5%
College diploma 6,083 23.1% -1.2%
Associate degree 3,575 13.6% 3.3%
Bachelor's degree 5,418 20.5% 3.4%
Graduate degree 1,783 6.8% -6.5%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Sioux County

How much people earn in Sioux County

The average annual household income in Sioux County was $104,988 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +0.7% change from the previous year. At the same time, the median income stood at $86,098, reflecting a +1.6% shift over the same period.

Average household income in Sioux County
$104,988/year
0.7% year-over-year change
Median household income in Sioux County
$86,098/year
1.6% year-over-year change

Sioux County income by age

In Sioux County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $100,981. Those with someone between 45 and 64 in charge, often well established professionally, earn $104,955 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $43,750, while those led by someone over 65, many of whom may be retired, have about $60,475 in earnings. Overall, 93.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $43,750 -5.5%
25 - 44 $100,981 6.6%
45 - 64 $104,955 -3.9%
Over 65 $60,475 5.1%
Above poverty level
31,273
Below poverty level
2,197
Value Percent YoY
change
Above poverty level 31,273 93.4% 0.2%
Below poverty level 2,197 6.6% 3.9%

Employment in Sioux County

Workforce and job types in Sioux County

The job market in Sioux County is powered by 19,094 working residents, spread across a range of industries and roles. 72.5% of the working population are employed in professional or administrative positions, while 27.5% are in hands-on or service-based jobs. Also, 17% run their own businesses, 62.4% are employed by private companies, and 9.5% work in the public sector.

Workforce demographics

Working population
19,094
0.1% year-over-year change
White collar
13,837
Blue collar
5,257
Value Percent YoY change
White collar 13,837 72.5% 2.6%
Blue collar 5,257 27.5% -6.0%
Employer type
Self employees
17%
Private companies
62.4%
Governmental workers
9.5%
Not for profit companies
11.1%
Value Percent YoY change
Self employees 3,244 17% -4.2%
Private companies 11,918 62.4% 4.0%
Governmental workers 1,807 9.5% -8.1%
Not for profit companies 2,125 11.1% -6.3%
Unemployment rate
1.5%
-24.4% year-over-year change

Available workforce

The unemployment rate in Sioux County stands at 1.5%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Sioux County

How people get around in Sioux County

In Sioux County, the average commute time is 14 minutes. Commuting methods vary: 82% of residents travel by personal vehicle and 3.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
14 min
6.3% year-over-year change
Means of transportation
Value Percent YoY change
Car 15,331 82% 0.4%
Bus or trolleybus 37 0.2% -11.9%
Railroad 3 0% -40.0%
Ferryboat 20 0.1% 11.1%
Motorcycle 2 0% -33.3%
Bicycle 116 0.6% 7.4%
Walk 633 3.4% -2.9%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Sioux County by zipcode?

Zipcode Population Number of households Median income Average income
51201 6,430 2,550 $68,799 $83,846
51234 1,172 412 $84,318 $98,084
51238 1,502 556 $74,000 $90,449
51003 1,938 730 $101,250 $114,618
51011 54 30 $44,375 $48,947
51022 960 385 $96,505 $97,016
51023 3,473 1,236 $80,357 $110,067
51027 1,280 415 $100,893 $112,634
51036 445 209 $122,841 $111,331
51041 7,324 2,520 $83,643 $100,229

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FAQs about Sioux County demographics 

What is the total population of Sioux County?

Sioux County has a total population of 36,212 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.6% compared to a year ago.

What is the gender ratio in Sioux County?

The gender ratio in Sioux County is as follows:
  • 50.6% males (18,320 residents)
  • 49.4% females (17,892 residents)

What is the median age in Sioux County?

The median age in Sioux County is 33.8.

What is the age distribution of the population in Sioux County?

The age distribution in Sioux County is as follows:
  • Under 15: 22.2% (8,056 residents)
  • Ages 15-24: 18.4% (6,670 residents)
  • Ages 25-44: 21.9% (7,932 residents)
  • Ages 45-64: 21.2% (7,688 residents)
  • Over 65: 16.2% (5,866 residents)

What is the racial and ethnic makeup of Sioux County?

The racial and ethnic makeup of Sioux County is as follows:
  • White: 85% (30,791 residents)
  • Black or African American: 0.6% (214 residents)
  • American Indian and Alaska Native: 0.4% (130 residents)
  • Asian: 0.5% (197 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (6 residents)
  • Two or More Races: 6.6% (2,391 residents)
  • Other: 6.9% (2,483 residents)

What percentage of the population in Sioux County are U.S.-born citizens?

U.S.-born citizens represent 90.9% of the population in Sioux County.

How many housing units are there in Sioux County?

There are 13,285 housing units in Sioux County, reflecting a +0.8% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Sioux County and what is the average household size?

Sioux County has a total of 12,690 households, with an average of 3 people in each.

What is the median household income in Sioux County?

Sioux County has a median household income of $86,098, representing a +1.6% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Sioux County?

The employment rate is 98.5% in Sioux County, with a workforce of 19,094 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 72.5% (13,837 residents)
  • Blue-collar workers: 27.5% (5,257 residents)

Places of employment:
  • Self-employed: 17% (3,244 residents)
  • Private companies: 62.4% (11,918 residents)
  • Governmental workers: 9.5% (1,807 residents)
  • Not-for-profit companies: 11.1% (2,125 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025