51240 ZIP Code — Inwood, IA

Lyon County, Iowa

ZIP code 51240 is located in Inwood, Iowa, within Lyon County. It covers approximately 100.43 square miles and serves a population of 1,629 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51240

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $159,000. Owner-occupancy is high at 86%, well above the national average.

Median household income is $86,875. The poverty rate of 3% is below the national average. 40% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 24 minutes is near the national average. Remote work is prevalent — 22% of workers work from home.

College attainment at 14% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 51240 reflects a community defined by a trades-oriented workforce, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

1,629
population
100.43
sq mi land
Standard
ZIP type
Central (CT)
timezone
51240 ZIP code map
Cities in ZIP code 51240

Below are the cities the US Postal Service accepts for ZIP code 51240. Using any city not on this list may result in mail delivery delays.

City Status
Inwood Preferred
Nearby ZIP codes
51230 Alvord (8 mi) 57013 Canton (8 mi) 57027 Fairview (8.2 mi) 51241 Larchwood (8.8 mi) 51247 Rock Valley (10.6 mi) 51235 Doon (11.4 mi) 57034 Hudson (13.2 mi) 57032 Harrisburg (14 mi) 57077 Worthing (15 mi) 57108 Sioux Falls (16.1 mi) 56138 Hills (16.7 mi) 51246 Rock Rapids (17 mi)
Demographics updated 05/2026
Population
Total population 1,629
Population density 16 / sq mi
State FIPS 19
County FIPS 119
Geography
Land area 100.43 sq mi
Water area 0.11 sq mi
Latitude 43.3109
Longitude -96.4597
Timezone Central (CT)
Area code 712
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 28.2% 35.8% 40.1%
$50k – $100k 49.6% 40.3% 33.4%
$100k – $200k 21.5% 21.9% 21.5%
Over $200k 0.7% 2.0% 5.0%

Demographics & statistics

1,629
Population
16
People per sq mi
38.0
Median age
$86,875
Median household income
$33,310
Per capita income
$159,000
Median home value
$1,010
Median monthly rent
86.2%
Home ownership
2.7%
Poverty rate
4.0%
Unemployment
557
Housing units
13.5%
Bachelor's or higher

Age distribution

Male Female
78
Under 5
92
41
5–9
49
44
10–14
52
43
15–19
50
47
20–24
55
97
25–34
114
87
35–44
104
53
45–54
62
32
55–59
39
51
60–64
61
104
65–74
123
35
75–84
41
34
85+
41
← Male
Female →

Age summary

GroupCount%
Under 1842326.0%
18 and over1,20674.0%
65 and over37823.2%
Median age38.0 years

Race & ethnicity

White 95.6%
Hispanic or Latino 1.5%
Asian 1%
Other race 0.9%
Two or more races 0.7%
American Indian / Alaska Native 0.2%
GroupCount%
White1,58295.6%
Hispanic or Latino251.5%
Asian171%
Other race150.9%
Two or more races120.7%
American Indian / Alaska Native30.2%

Household income

Income range This ZIP County avg State avg
Under $50k 28.2% 35.8% 40.1%
$50k – $100k 49.6% 40.3% 33.4%
$100k – $200k 21.5% 21.9% 21.5%
Over $200k 0.7% 2.0% 5.0%
Under $10k 0.6%
$10k–$15k 3.8%
$15k–$25k 4.0%
$25k–$35k 9.7%
$35k–$50k 11.3%
$50k–$75k 16.7%
$75k–$100k 16.4%
$100k–$150k 29.6%
$150k–$200k 4.6%
$200k+ 3.3%
Range% of households
Under $10k0.6%
$10k–$15k3.8%
$15k–$25k4.0%
$25k–$35k9.7%
$35k–$50k11.3%
$50k–$75k16.7%
$75k–$100k16.4%
$100k–$150k29.6%
$150k–$200k4.6%
$200k+3.3%
Median income$86,875

Housing

Home values

Under $50k 5.4%
$50k–$100k 14.4%
$100k–$150k 26.2%
$150k–$200k 14.9%
$200k–$300k 25.6%
$300k–$500k 10.7%
$500k–$1M 2.8%

Housing overview

MetricValue
Median home value$159,000
Median rent / month$1,010
Owner occupied86.2%
Renter occupied13.8%
Vacant2.3%
Single-family detached92.9%
Large apartment buildings0.0%
Mobile homes3.6%
Median rooms7.0
Avg household size (owned)2.63

Year built

Era%
2020 or later0.0%
2010–201910.4%
2000–20094.2%
1990–19998.4%
1980–198912.7%
1970–197917.2%
1960–196910.1%
1950–195913.0%
1940–19494.8%
1939 or earlier19.1%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom3.7%
2 bedrooms23.9%
3 bedrooms44.3%
4 bedrooms19.7%
5+ bedrooms8.4%

Vehicles per household

Vehicles% of households
No vehicle6.5%
1 vehicle19.1%
2 vehicles36.1%
3 or more38.3%

Heating fuel

Fuel type%
Utility gas43.1%
Electricity30.5%
Propane / LP gas20.8%

Households & families

Household typeCount%
Married-couple family39562.8%
Cohabiting couple172.7%
Male householder, no spouse9815.6%
Female householder, no spouse11918.9%
Households with children under 1823637.5%
Households with seniors (65+)25941.2%
Average household size2.53

Marital status

StatusMaleFemale
Never married14.7%25.5%
Married70.6%59.0%
Separated1.2%0.3%
Widowed1.1%12.5%
Divorced12.4%2.7%

Education

Less than 9th grade 5.1%
Some HS, no diploma 1.5%
HS graduate 42.3%
Some college, no degree 24.8%
Associate's degree 12.8%
Bachelor's degree 10.9%
Graduate / professional 2.7%
Metric%
HS diploma or higher93.4%
Bachelor's or higher13.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool4713.7%
Kindergarten349.9%
Elementary school12837.4%
High school7822.8%
College / grad school5516.1%

Employment

Industry of employment

Education & healthcare 32.6%
Manufacturing 16.6%
Agriculture & mining 13.5%
Transportation & utilities 7.6%
Construction 6.2%
Retail trade 5.6%
Other services 5.5%
Arts, food & hospitality 3.8%
Public administration 2.5%
Professional & management 2.2%
Wholesale trade 1.7%
Finance & real estate 1.5%
Information 0.8%

Occupation

Category%
Management, business & arts39.8%
Service10.5%
Sales & office23.3%
Natural resources & construction10.2%
Production & transportation16.2%

Employment type

Type%
Private sector79.0%
Government11.9%
Self-employed8.6%
Unpaid family workers0.5%

Commute

Method%
Drive alone70.1%
Carpool6.3%
Public transit0.0%
Walk1.3%
Work from home22.1%
Other means0.2%
Avg commute (minutes)23.7

Poverty

All people 2.7%
Under 18 years 4.7%
18 and over 2.0%
Married-couple families 0.3%
Female-led households 71.4%

Income support

Source% of households
Social Security39.6%
Retirement income16.4%
Supplemental Security1.7%
Cash public assistance0.3%
Food stamps / SNAP4.3%

Health indicators

Condition%
Obesity33.6%
High blood pressure33.0%
High cholesterol31.9%
Diabetes9.7%
Heart disease7.0%
Stroke3.1%
Asthma8.9%
Arthritis24.7%
Kidney disease2.9%
Pulmonary disease6.9%
Cancer7.6%
Behavior / access%
Smoking17.4%
Binge drinking20.5%
No physical activity24.2%
Less than 7 hrs sleep29.7%
Depression17.1%
Fair or poor health12.6%
Poor mental health13.0%
Poor physical health9.5%
No health insurance9.8%
Visited doctor (checkup)76.2%
Visited dentist66.0%
Cholesterol screening88.1%
Teeth loss13.9%

Veterans & disability

VeteransCount%
Civilian veterans988.1%
Disability%
Any disability16.2%
Under 189.7%
18–64 years20.3%
65 and over14.4%

Health insurance coverage

Type%
Private insurance81.3%
Public insurance34.8%
No insurance4.3%
Uninsured under 195.3%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,45989.6%
Spanish40.3%
Other Indo-European40.3%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,58197.1%
Born in same state1,57796.8%
Born in different state66841.0%
Foreign born40.2%
Naturalized citizen482.9%
Not a US citizen4695.8%

Ancestry

AncestryCount%
English76046.7%
Italian21413.1%
Polish654%
Arab654%
AncestryCount%
French191.2%
Dutch171%
German30.2%

Technology access

Metric% of households
Computer access38.6%
Internet access94.6%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 51240

What city is ZIP code 51240 in?

ZIP code 51240 is primarily assigned to Inwood, Iowa.

What county is ZIP code 51240 in?

ZIP code 51240 falls within Lyon County, Iowa.

Is ZIP code 51240 mostly owner-occupied?

86% of occupied units in ZIP code 51240 are owner-occupied, well above the national average.

How educated is the population of ZIP code 51240?

14% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Does ZIP code 51240 have a large retiree population?

40% of households in ZIP code 51240 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 51240?

The median home value in ZIP code 51240 is $159,000.

What timezone is ZIP code 51240 in?

ZIP code 51240 observes the CST timezone.

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