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Where am ILOCATED

Plymouth County, Iowa

Plymouth County, Iowa, has 25,697 residents (July 2025 estimate). Its county seat is Le Mars. It uses Central Time and covers 863 sq mi (2,235 km²) of land.

Des MoinesCedar RapidsDavenport
Plymouth County in Iowa
Union CountyLe MarsRemsenKingsley
Plymouth County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
25,697
Land area
863 sq mi (2,235 km²)
County seat or government
Le Mars
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$83,251 ± $4,100
Median home value
$228,900 ± $9,640
Median rent, with utilities
$910 ± $59
Homes lived in by their owners
73.6% ± 2.7 points
County type
County
Metro or micro area
Le Mars, IA micro areaCentral county
Water area
0.84 sq mi (2.18 km²)
State
Iowa
County code (FIPS)
19149
Coordinates (central point)
42.737615, -96.215973
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 Plymouth 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. 511085,960 people
  3. 511093,606 people
  4. 510502,962 people
  5. 510012,342 people
  6. 510282,191 people
  7. 510242,081 people
  8. 510351,627 people
  9. 510381,449 people
  10. 510271,280 people
  11. 51022960 people
  12. 51062503 people
All 15
  1. 51048435 people
  2. 51008210 people
  3. 5104566 people

15 ZIP Code areas overlap Plymouth 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

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Plymouth County, largest first

  1. America Township11,228 people
  2. Portland Township1,920 people
  3. Hungerford Township1,890 people
  4. Remsen Township1,888 people
  5. Garfield Township1,700 people
  6. Plymouth Township1,011 people
  7. Perry Township985 people
  8. Marion Township676 people
  9. Washington Township631 people
  10. Westfield Township490 people
  11. Grant Township350 people
  12. Stanton Township344 people
All 24
  1. Hancock Township312 people
  2. Liberty Township310 people
  3. Henry Township268 people
  4. Fredonia Township254 people
  5. Elkhorn Township232 people
  6. Lincoln Township232 people
  7. Preston Township229 people
  8. Meadow Township196 people
  9. Elgin Township195 people
  10. Sioux Township176 people
  11. Johnson Township152 people
  12. Union Township78 people

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

School districts in Plymouth County, largest first

  1. Sioux City Community School District87,389 people
  2. Le Mars Community School District13,986 people
  3. West Sioux Community School District4,020 people
  4. Remsen-Union Community School District3,363 people
  5. Lawton-Bronson Community School District3,183 people
  6. Akron-Westfield Community School District3,120 people
  7. Hinton Community School District2,924 people
  8. Marcus-Meriden-Cleghorn Community School District2,669 people
  9. Kingsley-Pierson Community School District2,520 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 City, Iowa (city)86,101 people
  2. Le Mars, Iowa (city)10,640 people
  3. Remsen, Iowa (city)1,823 people
  4. Akron, Iowa (city)1,689 people
  5. Kingsley, Iowa (city)1,472 people
  6. Hinton, Iowa (city)931 people
  7. Merrill, Iowa (city)846 people
  8. Brunsville, Iowa (city)210 people
  9. Westfield, Iowa (city)123 people
  10. Oyens, Iowa (city)81 people
  11. Struble, Iowa (city)76 people
  12. Craig, Iowa (city)49 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Union County, South Dakota23 mi west
  2. Sioux County, Iowa24 mi north
  3. Woodbury County, Iowa25 mi south
  4. Cherokee County, Iowa30 mi east
  5. O'Brien County, Iowa38 mi northeast

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.