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Where am ILOCATED

Sioux County, Iowa

Sioux County, Iowa, has 36,774 residents (July 2025 estimate). Its county seat is Orange City. It uses Central Time and covers 768 sq mi (1,989 km²) of land.

Des MoinesCedar RapidsDavenport
Sioux County in Iowa
Sioux CenterOrange CitySheldonRock ValleyHawarden
Sioux County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
36,774
Land area
768 sq mi (1,989 km²)
County seat or government
Orange City
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$86,098 ± $7,089
Median home value
$250,100 ± $9,233
Median rent, with utilities
$908 ± $64
Homes lived in by their owners
76.1% ± 2.0 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Le Mars, IA micro area, Sioux City, IA-NE-SD metro area, and Sioux Falls, SD-MN metro area
Water area
1.08 sq mi (2.8 km²)
State
Iowa
County code (FIPS)
19167
Coordinates (central point)
43.082618, -96.177980
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Sioux County

Time zoneLocal time and UTC offsetNext clock change
Central TimeAmerica/ChicagoUTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 5103112,808 people
  2. 512509,970 people
  3. 510417,324 people
  4. 512016,430 people
  5. 512475,094 people
  6. 510233,473 people
  7. 510502,962 people
  8. 512392,876 people
  9. 510031,938 people
  10. 512401,914 people
  11. 512381,502 people
  12. 510271,280 people
All 19
  1. 512341,172 people
  2. 512351,007 people
  3. 51022960 people
  4. 57034661 people
  5. 51036445 people
  6. 51244144 people
  7. 5101154 people

19 ZIP Code areas overlap Sioux County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

Sioux County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Sioux County, largest first

  1. West Branch Township7,272 people
  2. Holland Township6,606 people
  3. Rock Township4,680 people
  4. Lincoln Township2,694 people
  5. Welcome Township2,429 people
  6. Buncombe Township2,330 people
  7. Nassau Township2,266 people
  8. Floyd Township1,142 people
  9. Sheridan Township961 people
  10. East Orange Township786 people
  11. Center Township669 people
  12. Logan Township626 people
All 23
  1. Reading Township610 people
  2. Grant Township576 people
  3. Plato Township541 people
  4. Lynn Township470 people
  5. Capel Township409 people
  6. Sherman Township390 people
  7. Eagle Township193 people
  8. Washington Township184 people
  9. Garfield Township154 people
  10. Sioux Township117 people
  11. Settlers Township107 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Iowa, by county

School districts in Sioux County, largest first

  1. MOC-Floyd Valley Community School District11,239 people
  2. Sioux Center Community School District10,725 people
  3. Sheldon Community School District7,946 people
  4. Rock Valley Community School District5,212 people
  5. West Lyon Community School District5,160 people
  6. West Sioux Community School District4,020 people
  7. Boyden-Hull Community School District3,953 people
  8. Remsen-Union Community School District3,363 people
  9. George-Little Rock Community School District2,399 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Sioux Center, Iowa (city)8,454 people
  2. Orange City, Iowa (city)6,426 people
  3. Sheldon, Iowa (city)5,474 people
  4. Rock Valley, Iowa (city)4,059 people
  5. Hawarden, Iowa (city)2,658 people
  6. Hull, Iowa (city)2,317 people
  7. Alton, Iowa (city)1,459 people
  8. Hospers, Iowa (city)916 people
  9. Boyden, Iowa (city)757 people
  10. Ireton, Iowa (city)552 people
  11. Granville, Iowa (city)265 people
  12. Maurice, Iowa (city)206 people
All 14
  1. Matlock, Iowa (city)144 people
  2. Chatsworth, Iowa (city)54 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Lyon County, Iowa21 mi north
  2. Plymouth County, Iowa24 mi south
  3. O'Brien County, Iowa28 mi east
  4. Union County, South Dakota30 mi southwest
  5. Lincoln County, South Dakota31 mi northwest
  6. Osceola County, Iowa34 mi northeast
  7. Cherokee County, Iowa36 mi southeast

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.