51031 ZIP Code, Le Mars, IA
51031 is a ZIP code in Le Mars, Iowa in Plymouth County. It covers 234 square miles of land. The closest ZIP codes are 51008, 51045 and 51038. 12,808 people live here in 5,217 households, more than in 9 of every 10 Iowa ZIP codes. It is rural, with fewer than 100 people per square mile, and owners and renters are mixed (65% own). Median household income is $76,525, close to the Iowa median of $75,059.
Quick facts
- Mailing city: Le Mars, IA
- County: Plymouth County
- Land area: 234 sq mi
- Population: 12,808
- Median household income: $76,525
Key figures
| Measure | Value |
|---|---|
| Residents | 12,808 |
| Households | 5,217 |
| Median household income | $76,525 |
| Income per person | $38,599 |
| Median age | 39 |
| Homeowners | 65.1% |
| Median home value | $222,800 |
| Median rent | $928 |
| Bachelor's degree or higher | 21.9% |
| Average commute (minutes) | 16.8 |
| Households with kids under 18 | 31.8% |
| Moved in the past year | 9.9% |
| Below the poverty line | 8.3% |
| Broadband internet | 90.3% |
| Speak a non-English language at home | 10.7% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.9% |
| $10–15K | 3.9% |
| $15–25K | 6.0% |
| $25–35K | 7.8% |
| $35–50K | 6.7% |
| $50–75K | 21.1% |
| $75–100K | 20.0% |
| $100–150K | 16.5% |
| $150–200K | 8.7% |
| $200K+ | 6.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.8% |
| 10–19 | 14.7% |
| 20–24 | 5.7% |
| 25–34 | 13.2% |
| 35–44 | 12.1% |
| 45–54 | 11.3% |
| 55–64 | 12.8% |
| 65–74 | 10.2% |
| 75+ | 7.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 31.3% |
| Owned outright | 31.0% |
| Rented | 33.2% |
| Vacant | 4.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 69.0% |
| Townhome | 3.8% |
| 2–4 units | 8.3% |
| 5–19 units | 11.6% |
| 20+ units | 1.8% |
| Mobile / other | 5.4% |
Businesses in 51031
383 business establishments with 8,591 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 47
- Other Services (except Public Administration): 46
- Construction: 44
- Health Care and Social Assistance: 36
- Transportation and Warehousing: 33
- Accommodation and Food Services: 33
- Manufacturing: 21
- Finance and Insurance: 21
EDDM carrier routes
See every USPS carrier route in 51031 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 51008 — Brunsville city, IA (4.1 mi)
- 51045 — Oyens city, IA (6.6 mi)
- 51038 — Merrill city, IA (9.6 mi)
- 51036 — Maurice city, IA (11.5 mi)
- 51050 — Remsen city, IA (12.1 mi)
- 51024 — Hinton city, IA (12.8 mi)
- 51027 — Ireton city, IA (13.3 mi)
- 51041 — Orange City city, IA (16.3 mi)
Areas that include 51031
- Le Mars, IA ZIP codes — 1 ZIP code
- Oyens, IA ZIP codes — 2 ZIP codes
- Struble, IA ZIP codes — 1 ZIP code
- Craig, IA ZIP codes — 1 ZIP code
- Plymouth County ZIP codes — 13 ZIP codes
- Iowa ZIP code data
Where it ranks
- No. 3 of 9: highest median home value in Plymouth County
- No. 5 of 9: highest share of households with children in Plymouth County
- No. 5 of 9: highest share of residents who moved in during the past year in Plymouth County
- No. 3 of 9: lowest median age in Plymouth County
Mail every home in 51031
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 51031, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 51031 in?
- 51031 is a Le Mars, IA mailing address. By land area, 4% lies inside Le Mars; the rest is outside any Census-defined city or community.
- What county is 51031 in?
- 51031 is in Plymouth County.
- What is the population of 51031?
- About 12,808 people (±418), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,960.
- What is the median household income in 51031?
- $76,525 (±$5,735), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 51031?
- EDDM2GO's stored route library does not include 51031 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 51031?
- The closest, measured center to center: 51008 (4.1 mi, Brunsville), 51045 (6.6 mi, Oyens), 51038 (9.6 mi, Merrill), 51036 (11.5 mi, Maurice), 51050 (12.1 mi, Remsen) and 51024 (12.8 mi, Hinton).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.