ZIP Code 51031, Iowa
ZIP Code 51031 profile, demographic data, and geographic information.
ZCTA5 51031 is a 5-digit ZIP Code area located in Plymouth County / Sioux County, Iowa. As of official census estimates, it has a reported population of 12,808. The land area covers 234.14 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 12,808 | ±418 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 39 yrs | ±1.8 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 5,217 | ±245 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 5,461 | ±250 |
| Occupied Housing Units | 5,217 | ±245 |
| Vacant Housing Units | 244 | ±155 |
| Median Home Value | $222,800 | ±$15,080 |
| Median Gross Rent | $928 | ±$42 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $76,525 | ±$5,735 |
| Per Capita Income | $38,599 | ±$2,951 |
| Poverty Rate | 8.3% | ±2.4% |
| Population Below Poverty Level | 1,054 | ±310 |
| Unemployment Rate | 2.6% | ±1.6% |
| Civilian Labor Force, Employed | 6,843 | ±370 |
| Broadband Internet Rate | 90.3% | ±2.8% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
COUNTY OF PLYMOUTH
GUS Population: 25,825 (2024)
ID: 126552
|
County | Official County Government |
Contact: COUNTY AUDITOR
215 4TH AVE SE, LE MARS IA 51031-2153
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | PK-05 | Le Mars, IA | |
| Regular School Nearby | KG-05 | Le Mars, IA | |
| Regular School Nearby | PK-03 | Hinton, IA | |
| Regular School Nearby | 07-12 | Hinton, IA | |
| Regular School Nearby | 04-06 | Hinton, IA | |
| Alternative School Nearby | 09-12 | Le Mars, IA | |
| Regular School Nearby | PK-01 | Ireton, IA | |
| Regular School Nearby | KG-04 | Kingsley, IA | |
| Regular School Nearby | 09-12 | Kingsley, IA | |
| Regular School Nearby | KG-05 | Le Mars, IA |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Northwestern College
|
College | 15.0 mi away | 101 Seventh St SW, Orange City, IA, 51041 |
7127077000
|
|
LE MARS PUBLIC LIBRARY
|
Library | 1.2 mi away | 46 1ST ST SW, LE MARS, IA, 51031 |
(712) 546-5004
|
|
Dordt University
|
College | 19.3 mi away | 700 7th St SE, Sioux Center, IA, 51250-1606 |
7127226000
|
|
MERRILL PUBLIC LIBRARY
|
Library | 6.7 mi away | 608 MAIN ST, MERRILL, IA, 51038 |
(712) 938-2503
|
|
St Luke's College
|
College | 22.5 mi away | 2720 Stone Park Blvd, Sioux City, IA, 51104-0263 |
7122793149
|
|
REMSEN PUBLIC LIBRARY
|
Library | 10.9 mi away | 211 FULTON ST, REMSEN, IA, 51050 |
(712) 786-2911
|
|
Briar Cliff University
|
College | 22.7 mi away | 3303 Rebecca Street, Sioux City, IA, 51104 |
7122795200
|
|
ORANGE CITY PUBLIC LIBRARY
|
Library | 15.4 mi away | 112 ALBANY AVE SE, ORANGE CITY, IA, 51041 |
(712) 707-4302
|
|
Western Iowa Tech Community College
|
College | 23.6 mi away | 4647 Stone Ave, Sioux City, IA, 51102-5199 |
7122748733
|
|
ALTON PUBLIC LIBRARY
|
Library | 15.5 mi away | 605 10TH ST, ALTON, IA, 51003 |
(712) 756-4516
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at LE MARS, IA US, located 2.5 miles from ZCTA5 51031. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 27.2° | 7.4° | 17.3° | 0.72" | 7.8" |
| February | 32.2° | 11.4° | 21.8° | 0.87" | 7.5" |
| March | 45.9° | 23.1° | 34.5° | 1.85" | 4.6" |
| April | 59.9° | 34.2° | 47.0° | 3.07" | 1.9" |
| May | 71.7° | 47.0° | 59.3° | 3.90" | 0.1" |
| June | 81.3° | 58.3° | 69.8° | 4.64" | 0.0" |
| July | 84.5° | 61.7° | 73.1° | 3.11" | 0.0" |
| August | 82.0° | 59.0° | 70.5° | 3.95" | 0.0" |
| September | 75.8° | 49.6° | 62.7° | 3.14" | 0.0" |
| October | 62.5° | 36.9° | 49.7° | 2.40" | 0.4" |
| November | 45.7° | 23.5° | 34.6° | 1.30" | 2.6" |
| December | 32.0° | 12.9° | 22.4° | 1.04" | 6.0" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Le Mars city | City | 1.6 mi | — |
| Brunsville city | City | 4.1 mi | — |
| Struble city | City | 6.3 mi | — |
| Merrill city | City | 6.6 mi | — |
| Oyens city | City | 6.6 mi | — |
| Craig city | City | 8.9 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 51031. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.