US ZIP Code
51031

Le Mars, IA

Plymouth County  ·  Iowa

● Active
👥 12,785 Population ↑ 6% since 2019
💰 $74,978 Median HH Income
≈ Avg ↑ 14% since 2019
🎂 39.0 Median Age
🏠 $208,900 Median Home Value
▼ 25% below avg ↑ 28% since 2019
🎓 40.8% College Grads
≈ Avg
📊 1.5% Unemployment
▼ 69% below avg ↓ 17% since 2019
ZIP Code Details
ZIP Code51031
CityLe Mars
StateIowa (IA)
CountyPlymouth County
Area Code712
Elevation1,272 ft
Latitude42.80324
Longitude-96.186428
TimezoneChicago (DST)
FIPS19149
ZIP TypeStandard
StatusActive
People & Population (ACS 2023)
♂ Male 50.1% (6,404) Female 49.9% (6,381) ♀

Race & Ethnicity

White: 84.7%Hispanic: 9.1%Black: 4.5%Asian: 0.1%Other: 1.5%Race
White84.7%
Hispanic9.1%
Black4.5%
Asian0.1%
Other1.5%

Age Breakdown

Under 5
5%
5–17
21%
18–24
7%
25–44
25%
45–64
25%
65+
6%

Key Indicators

Median Age39.0 yrs
Avg Household Size2.41
Below Poverty8.0% ▼ 21% below avg
College Grads40.8% ≈ Avg
Unemployment1.5% ▼ 69% below avg
No HS Diploma58 (0.7%)
HS Graduate2,687 (33.2%)
Some College947 (11.7%)
Associates1,101 (13.6%)
Bachelors1,229 (15.2%)
Graduate Degree2,080 (25.7%)

Education

No HS: 0.7%HS Grad: 33.2%Some College: 11.7%Associates: 13.6%Bachelors: 15.2%Graduate: 25.7%Edu
No HS0.7%
HS Grad33.2%
Some College11.7%
Associates13.6%
Bachelors15.2%
Graduate25.7%
Housing & Income

Housing Tenure

Owner: 65.8%Renter: 34.2%Tenure
Owner65.8%
Renter34.2%

Home Value Distribution

Under $50k
10%
$50k–100k
6%
$100k–150k
13%
$150k–200k
18%
$200k–300k
27%
$300k–500k
20%
Over $500k
5%

Financials

Median HH Income$74,978 ≈ Avg ↑ 14% since 2019
Median Home Value$208,900 ▼ 25% below avg ↑ 28% since 2019
Home/Income Ratio2.8x (nat avg ~3.5x)
Median Rent$903/mo ↑ 33% since 2019
Total Units5,443
Vacant Units229
Avg HH Size2.41

Income Distribution

Under $25k
15%
$25k–50k
12%
$50k–75k
22%
$75k–100k
21%
$100k–150k
14%
$150k–200k
8%
Over $200k
8%
Employment & Commute

How People Get to Work

Drove Alone
91%
Public Transit
0%
Walked
3%
Work From Home
5%

Commute Time

Under 15 min
62%
15–30 min
19%
30–45 min
15%
Over 45 min
5%
Housing Stock

Year Built

Before 1940
2%
1940s–1950s
13%
1960s–1970s
12%
1980s–1990s
14%
2000+
59%

Summary

Total Units5,443
Vacant229
Owner Occupied65.8%
Renter Occupied34.2%
Avg HH Size2.41
Frequently Asked Questions
ZIP code 51031 is in Le Mars, IA, in Plymouth County.
ZIP code 51031 is located in Iowa (IA).
ZIP code 51031 is in Plymouth County, IA.
ZIP 51031 observes the Chicago timezone. Daylight Saving Time is observed.
The estimated population of ZIP code 51031 is 12,785 people (ACS 2023).
The median household income in ZIP code 51031 is $74,978 (ACS 2023).
The median home value in ZIP 51031 is $208,900 (ACS 2023).
About ZIP Code 51031

ZIP code 51031 is located in Le Mars, Iowa, within Plymouth County. With a population of 12,785, this is a lightly populated ZIP code with a middle-aged community — the median age is 39 years. Economically, 51031 is a solidly middle-class ZIP code: the median household income of $74,978 is near the national average.

Real estate in ZIP code 51031 represents an affordable housing market. The median home value of $208,900 is below the national average. Renters can expect to pay around $903 per month in median rent. Homeownership is strong here — 65.8% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 28% since 2019.

The population of 51031 is primarily White (84.72%). Residents are well-educated — 40.8% hold a bachelor's degree or higher, which is near the national average. Poverty affects a relatively small share of residents at 8.0%. Household income has grown by 14% since 2019.

The unemployment rate in 51031 stands at 1.5%, which is well below the national average. As in most parts of the country, driving alone is the dominant commute mode at 81%.

Overall, ZIP code 51031 in Le Mars, IA is characterized as solidly middle-class, well-educated, a middle-aged community, and predominantly owner-occupied. With 12,785 residents, a median household income of $74,978, and a median home value of $208,900, it offers a clear picture of life in this part of Iowa.