• county
  • FIPS 19167
  • Largest town: Sioux Center

Sioux County, Iowa

Sioux County had 36,554 residents in the Census Vintage 2024 estimate, on 767.9 square miles of land. It ranks 19th of 99 in Iowa by population and 6th by land area.

Population
36,554
#19 of 99 in Iowa · #1,281 in US
Area
767.9 sq mi
#6 of 99 in Iowa · #1,130 in US
Density
48 / sq mi
#24 of 99 in Iowa · #1,518 in US
Median household income
$85,985
#4 of 99 in Iowa · #311 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Sioux County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Sioux County

Sioux County population, land area and income

Sioux County had 36,554 residents in the Census Vintage 2024 estimate, on 767.9 square miles of land. It ranks 19th of 99 in Iowa by population and 6th by land area. That works out to 47.6 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Iowa has 15,008 residents, so Sioux County is 2.4 times that size.

Its SAIPE 2023 median household income of $85,985 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

36,554

3144th1st

1281st of 3,144 (US)

Land area

768 sq mi

3144th1st

1130th of 3,144 (US)

Density

47.6 / sq mi

3144th1st

1518th of 3,144 (US)

Median household income

$85,985

3143rd1st

311th of 3,143 (US)

Rank within Iowa (99)

Population

36,554

99th1st

19th of 99 (IA)

Land area

768 sq mi

99th1st

6th of 99 (IA)

Density

47.6 / sq mi

99th1st

24th of 99 (IA)

Median household income

$85,985

99th1st

4th of 99 (IA)

How Sioux County's population changed since 2020

Sioux County gained 657 residents between the July 2020 and July 2024 estimates, a rise of 1.8%. That ranks 13th of 99 in Iowa for growth. The median Iowa county changed by -0.6%, and the state as a whole by +1.6%.

Since the April 2020 estimates base, Sioux County recorded 2,084 births and 1,191 deaths, a natural change of +893. Net international migration added +597 and net domestic migration, people moving to or from other US counties, came to -811. The largest single component was natural change, which added 893 people.

35.9k202036.0k202136.2k202236.4k202336.6k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
2,084
Deaths
1,191
Net international migration
+597
Net domestic migration
-811
Change, July 2023 to July 2024
+155

Where Sioux County is

The Census internal point of Sioux County is at 43.082600, -96.178000. It sits in UTM zone 14N. The map shades Iowa's 99 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sioux County outlined. Dots are towns of 1,000+ people with residents in it.

Monroe County: -2.9%Worth County: -1.7%Buena Vista County: +0.0%Jasper County: +0.8%Van Buren County: -0.0%Hardin County: -2.2%Ida County: -3.1%Marshall County: +0.8%Fayette County: -1.5%Ringgold County: -0.8%Wapello County: +1.0%Webster County: -0.2%Adams County: -2.8%Buchanan County: +0.6%Cerro Gordo County: -1.2%Lucas County: +1.6%Emmet County: -1.9%Floyd County: -3.8%Crawford County: -0.7%Linn County: +0.6%Montgomery County: -2.6%Polk County: +4.7%Cherokee County: +0.0%Bremer County: +1.3%Grundy County: +0.5%Adair County: -0.8%Cedar County: -1.4%Story County: +3.9%Mahaska County: -0.6%Davis County: +0.9%Clay County: +0.8%Johnson County: +4.6%Greene County: -1.0%Palo Alto County: -2.0%Benton County: +1.0%Cass County: -0.7%Wright County: -1.5%Audubon County: -2.1%Henry County: -5.3%Boone County: +0.1%Appanoose County: -1.4%Washington County: +0.4%Chickasaw County: -2.2%Poweshiek County: -0.9%Osceola County: -2.6%Wayne County: +1.8%Mitchell County: +0.4%Jefferson County: +0.5%Union County: -1.4%Butler County: -1.2%Hancock County: -1.3%Marion County: +1.9%Delaware County: +0.9%Humboldt County: +0.2%Sioux County: +1.8%Des Moines County: -1.1%O'Brien County: +0.8%Clayton County: -0.6%Black Hawk County: +1.0%Winnebago County: -2.6%Harrison County: +0.4%Decatur County: -1.0%Pocahontas County: -0.9%Lyon County: +3.8%Iowa County: -1.4%Franklin County: +0.3%Dickinson County: +2.2%Madison County: +3.2%Allamakee County: +0.8%Jones County: +2.2%Carroll County: -1.6%Kossuth County: -2.6%Hamilton County: -1.0%Howard County: -1.4%Page County: -1.1%Guthrie County: +1.5%Tama County: -1.8%Monona County: -3.6%Clarke County: -2.1%Lee County: -3.4%Mills County: +2.1%Sac County: -2.7%Scott County: +0.6%Keokuk County: -1.6%Jackson County: -0.3%Warren County: +7.1%Calhoun County: -1.9%Shelby County: +0.8%Fremont County: -1.1%Dubuque County: -0.1%Louisa County: -1.8%Taylor County: -0.6%Woodbury County: +1.2%Clinton County: -0.9%Winneshiek County: -1.6%Pottawattamie County: -0.1%Plymouth County: +0.5%Muscatine County: -2.4%Dallas County: +14.7%
Change 2020 to 2024
  1. < -1.9%
  2. < -1.0%
  3. < +0.0%
  4. < +0.9%
  5. ≥ +0.9%
no data

Orange pin: Sioux County internal point. Dark pin: Des Moines.

Internal point

Decimal
43.082600, -96.178000
DMS
43°04'57.36"N 96°10'40.80"W
UTM
14N 729714.6E 4773853.2N
Geohash
9zet56vq6
Plus code
86M53RMC+2R

Towns in Sioux County

7 incorporated places of 1,000+ people have residents in Sioux County, 25,846 people together, or 71% of the county. Each figure counts only the part of the town inside Sioux County; towns marked "part" extend into another county. The largest is Sioux Center with 8,675.

  1. 01Sioux Center8,675
  2. 02Orange City6,547
  3. 03Rock Valley4,024
  4. 04Hawarden2,630
  5. 05Hull2,459
  6. 06Alton1,248
  7. 07Sheldon (part)263
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Sioux County

The Census 2024 county adjacency file lists 7 neighbors for Sioux County, including 2 across a state line. The most populous is Lincoln County, SD, with 75,244 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 167.0 miles SE of Sioux County's internal point in a straight line. The nearest place of 100,000 or more is Sioux Falls, SD (population 209,289), 42.2 miles away. The nearest place of 10,000 or more is Le Mars, IA (population 10,674), 20.8 miles away.

Sioux County FIPS code

The FIPS code of Sioux County is 19167: state code 19 for Iowa plus county code 167. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $85,985.

Questions people ask

What is the population of Sioux County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 36,554. That is up 657 people (1.8%) from the July 2020 estimate of 35,897.

What is the FIPS code of Sioux County?

19167. The first two digits (19) are Iowa; the last three (167) identify the county.

What is the largest town in Sioux County?

Sioux Center, with 8,675 residents inside Sioux County in 2024.

Which counties border Sioux County?

7 county-equivalents border it in the Census 2024 adjacency file: Lincoln County, SD; Plymouth County, IA; Union County, SD; O'Brien County, IA; Lyon County, IA; Cherokee County, IA; Osceola County, IA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.