51545 ZIP Code — Little Sioux, IA

Harrison County, Iowa

ZIP code 51545 is located in Little Sioux, Iowa, within Harrison County. It covers approximately 46.46 square miles and serves a population of 271 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51545

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 $53,900. Owner-occupancy sits near the national average at 74%.

Median household income is $40,625. Poverty affects 19% of residents, above the national average. 52% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is service, with education and healthcare as the leading industry. An above-average commute of 44 minutes suggests many residents work outside the immediate area. Remote work is prevalent — 22% of workers work from home.

College attainment at 8% is below the national average, consistent with a trades and production-oriented local economy.

Notable community characteristics include a notable veteran presence at 13% of civilians, above the national average of 7%.

Overall, ZIP code 51545 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, a strong veteran community, a high rate of remote workers, and a significant Social Security-dependent population.

271
population
46.46
sq mi land
Standard
ZIP type
Central (CT)
timezone
51545 ZIP code map
Cities in ZIP code 51545

Below are the cities the US Postal Service accepts for ZIP code 51545. Using any city not on this list may result in mail delivery delays.

City Status
Little Sioux Acceptable
Demographics updated 05/2026
Population
Total population 271
Population density 6 / sq mi
State FIPS 19
County FIPS 085
Geography
Land area 46.46 sq mi
Water area 0.82 sq mi
Latitude 41.8139
Longitude -96.0610
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 63.7% 37.9% 40.1%
$50k – $100k 27.4% 35.3% 33.4%
$100k – $200k 8.9% 23.0% 21.5%
Over $200k 0.0% 3.8% 5.0%

Demographics & statistics

271
Population
6
People per sq mi
43.3
Median age
$40,625
Median household income
$23,110
Per capita income
$53,900
Median home value
$485
Median monthly rent
73.5%
Home ownership
19.2%
Poverty rate
7.1%
Unemployment
108
Housing units
8.4%
Bachelor's or higher

Age distribution

Male Female
9
Under 5
10
9
5–9
10
16
10–14
16
8
15–19
8
3
20–24
3
6
25–34
7
19
35–44
20
4
45–54
5
12
55–59
13
6
60–64
6
27
65–74
27
12
75–84
13
1
85+
1
← Male
Female →

Age summary

GroupCount%
Under 188230.3%
18 and over18969.7%
65 and over8129.9%
Median age43.3 years

Race & ethnicity

White 91.7%
Black or African American 4%
Hispanic or Latino 1.8%
Two or more races 1.1%
Other race 1.1%
American Indian / Alaska Native 0.4%
GroupCount%
White25391.7%
Black or African American114%
Hispanic or Latino51.8%
Two or more races31.1%
Other race31.1%
American Indian / Alaska Native10.4%

Household income

Income range This ZIP County avg State avg
Under $50k 63.7% 37.9% 40.1%
$50k – $100k 27.4% 35.3% 33.4%
$100k – $200k 8.9% 23.0% 21.5%
Over $200k 0.0% 3.8% 5.0%
Under $10k 14.2%
$10k–$15k 11.5%
$15k–$25k 12.4%
$25k–$35k 7.1%
$35k–$50k 7.1%
$50k–$75k 15.0%
$75k–$100k 22.1%
$100k–$150k 7.1%
$200k+ 3.5%
Range% of households
Under $10k14.2%
$10k–$15k11.5%
$15k–$25k12.4%
$25k–$35k7.1%
$35k–$50k7.1%
$50k–$75k15.0%
$75k–$100k22.1%
$100k–$150k7.1%
$200k+3.5%
Median income$40,625

Housing

Home values

Under $50k 45.8%
$50k–$100k 20.5%
$100k–$150k 16.9%
$150k–$200k 7.2%
$300k–$500k 7.2%
$500k–$1M 2.4%

Housing overview

MetricValue
Median home value$53,900
Median rent / month$485
Owner occupied73.5%
Renter occupied26.5%
Vacant18.1%
Single-family detached89.1%
Large apartment buildings0.0%
Mobile homes8.0%
Median rooms6.3
Avg household size (owned)2.42

Year built

Era%
2020 or later0.0%
2010–20194.3%
2000–20092.9%
1990–199910.1%
1980–19895.1%
1970–197920.3%
1960–19693.6%
1950–19598.7%
1940–19493.6%
1939 or earlier41.3%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom5.1%
2 bedrooms37.0%
3 bedrooms39.9%
4 bedrooms10.9%
5+ bedrooms7.2%

Vehicles per household

Vehicles% of households
No vehicle4.4%
1 vehicle17.7%
2 vehicles50.4%
3 or more27.4%

Heating fuel

Fuel type%
Utility gas4.4%
Electricity23.0%
Propane / LP gas60.2%
Wood10.6%

Households & families

Household typeCount%
Married-couple family4842.5%
Cohabiting couple87.1%
Male householder, no spouse2320.4%
Female householder, no spouse3430.1%
Households with children under 182925.7%
Households with seniors (65+)5447.8%
Average household size2.40

Marital status

StatusMaleFemale
Never married24.4%21.6%
Married54.4%45.0%
Separated0.0%0.0%
Widowed3.3%21.6%
Divorced17.8%11.7%

Education

Less than 9th grade 6.7%
Some HS, no diploma 4.5%
HS graduate 54.2%
Some college, no degree 21.2%
Associate's degree 5.0%
Bachelor's degree 8.4%
Graduate / professional 0.0%
Metric%
HS diploma or higher88.8%
Bachelor's or higher8.4%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool23.0%
Kindergarten710.6%
Elementary school4162.1%
High school1624.2%
College / grad school00.0%

Employment

Industry of employment

Education & healthcare 25.3%
Professional & management 17.7%
Arts, food & hospitality 13.9%
Transportation & utilities 10.1%
Manufacturing 7.6%
Agriculture & mining 6.3%
Construction 6.3%
Wholesale trade 6.3%
Retail trade 2.5%
Other services 2.5%
Information 1.3%

Occupation

Category%
Management, business & arts16.5%
Service34.2%
Sales & office16.5%
Natural resources & construction19.0%
Production & transportation13.9%

Employment type

Type%
Private sector79.7%
Government11.4%
Self-employed8.9%
Unpaid family workers0.0%

Commute

Method%
Drive alone69.6%
Carpool8.9%
Public transit0.0%
Walk0.0%
Work from home21.5%
Other means0.0%
Avg commute (minutes)43.5

Poverty

All people 19.2%
Under 18 years 8.5%
18 and over 23.8%
Married-couple families 14.6%
Female-led households 20.0%

Income support

Source% of households
Social Security52.2%
Retirement income19.5%
Supplemental Security5.3%
Cash public assistance2.7%
Food stamps / SNAP16.8%

Health indicators

Condition%
Obesity40.8%
High blood pressure36.7%
High cholesterol37.4%
Diabetes11.1%
Heart disease7.5%
Stroke3.3%
Asthma9.0%
Arthritis27.2%
Kidney disease3.1%
Pulmonary disease7.6%
Cancer7.7%
Behavior / access%
Smoking18.6%
Binge drinking20.7%
No physical activity25.9%
Less than 7 hrs sleep31.5%
Depression17.6%
Fair or poor health13.7%
Poor mental health12.8%
Poor physical health10.1%
No health insurance9.3%
Visited doctor (checkup)74.9%
Visited dentist67.7%
Cholesterol screening89.7%
Teeth loss12.9%

Veterans & disability

VeteransCount%
Civilian veterans2513.2%
Disability%
Any disability19.2%
Under 189.8%
18–64 years25.9%
65 and over19.8%

Health insurance coverage

Type%
Private insurance45.4%
Public insurance67.9%
No insurance5.9%
Uninsured under 191.2%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only25293.0%
Spanish62.4%
Other Indo-European62.4%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)26798.5%
Born in same state26798.5%
Born in different state16159.4%
Foreign born00.0%
Naturalized citizen41.5%
Not a US citizen4100.0%

Ancestry

AncestryCount%
Italian6323.2%
Arab217.7%
French124.4%
Polish31.1%
AncestryCount%
German20.7%
English20.7%
Norwegian20.7%
Dutch10.4%

Technology access

Metric% of households
Computer access41.7%
Internet access73.5%

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

Frequently asked questions about ZIP code 51545

What city is ZIP code 51545 in?

ZIP code 51545 is primarily assigned to Little Sioux, Iowa.

What county is ZIP code 51545 in?

ZIP code 51545 falls within Harrison County, Iowa.

Does ZIP code 51545 have an older population?

30% of residents in ZIP code 51545 are 65 or older, above the national average of ~17%.

Does ZIP code 51545 have a large retiree population?

52% of households in ZIP code 51545 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 51545?

8% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the poverty rate in ZIP code 51545?

19% of residents in ZIP code 51545 live below the poverty line, above the national average.

What timezone is ZIP code 51545 in?

ZIP code 51545 observes the CST timezone.

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