51056 ZIP Code — Smithland, IA

Woodbury County, Iowa

ZIP code 51056 is located in Smithland, Iowa, within Woodbury County. It covers approximately 33.59 square miles and serves a population of 464 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51056

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 $101,000. Owner-occupancy is high at 97%, well above the national average.

Median household income is $69,858. The poverty rate of 4% is below the national average. SNAP benefit usage at 28% of households reflects economic stress in the area. 69% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. An above-average commute of 46 minutes suggests many residents work outside the immediate area.

College attainment at 9% is below the national average, consistent with a trades and production-oriented local economy.

Notable community characteristics include disability rates above the national average at 33%.

Overall, ZIP code 51056 reflects a community defined by a trades-oriented workforce, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

464

population

33.59

sq mi land

Standard

ZIP type

Central (CT)

timezone

51056 ZIP code map

Cities in ZIP code 51056

Below are the cities the US Postal Service accepts for ZIP code 51056. Using any city not on this list may result in mail delivery delays.

City	Status
Smithland	Preferred

Nearby ZIP codes

51044 Oto (3.9 mi) 51051 Rodney (4 mi) 51026 Hornick (6.4 mi) 51004 Anthon (8.7 mi) 51010 Castana (10.2 mi) 51034 Mapleton (11.9 mi) 51063 Whiting (12.3 mi) 51019 Danbury (12.4 mi) 51039 Moville (14.7 mi) 51055 Sloan (14.8 mi) 51007 Bronson (15.1 mi) 51016 Correctionville (15.9 mi)

Demographics updated 05/2026

Population
Total population	464
Population density	14 / sq mi
State FIPS	19
County FIPS	193

Geography
Land area	33.59 sq mi
Water area	0.12 sq mi
Latitude	42.2477
Longitude	-95.9576
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	38.5%	40.6%	40.1%
$50k – $100k	52.3%	33.9%	33.4%
$100k – $200k	9.2%	21.3%	21.5%
Over $200k	0.0%	4.2%	5.0%

Demographics & statistics

464

Population

People per sq mi

52.9

Median age

$69,858

Median household income

$34,355

Per capita income

$101,000

Median home value

$692

Median monthly rent

97.4%

Home ownership

3.7%

Poverty rate

0.9%

Unemployment

238

Housing units

9.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	68	14.7%
18 and over	396	85.3%
65 and over	161	34.7%
Median age	52.9 years

Race & ethnicity

White 96.3%

American Indian / Alaska Native 3.4%

Two or more races 0.2%

Group	Count	%
White	447	96.3%
American Indian / Alaska Native	16	3.4%
Two or more races	1	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.5%	40.6%	40.1%
$50k – $100k	52.3%	33.9%	33.4%
$100k – $200k	9.2%	21.3%	21.5%
Over $200k	0.0%	4.2%	5.0%

Under $10k 1.0%

$10k–$15k 1.0%

$15k–$25k 4.6%

$25k–$35k 5.6%

$35k–$50k 13.3%

$50k–$75k 27.7%

$75k–$100k 15.9%

$100k–$150k 22.1%

$150k–$200k 3.1%

$200k+ 5.6%

Range	% of households
Under $10k	1.0%
$10k–$15k	1.0%
$15k–$25k	4.6%
$25k–$35k	5.6%
$35k–$50k	13.3%
$50k–$75k	27.7%
$75k–$100k	15.9%
$100k–$150k	22.1%
$150k–$200k	3.1%
$200k+	5.6%
Median income	$69,858

Housing

Home values

Under $50k 31.6%

$50k–$100k 17.9%

$100k–$150k 17.4%

$150k–$200k 10.0%

$200k–$300k 23.2%

Housing overview

Metric	Value
Median home value	$101,000
Median rent / month	$692
Owner occupied	97.4%
Renter occupied	2.6%
Vacant	19.8%
Single-family detached	97.9%
Large apartment buildings	0.0%
Mobile homes	2.1%
Median rooms	6.1
Avg household size (owned)	2.38

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	3.7%
1990–1999	20.6%
1980–1989	0.4%
1970–1979	7.4%
1960–1969	4.5%
1950–1959	10.7%
1940–1949	4.5%
1939 or earlier	48.1%

Bedrooms

Size	% of units
No bedroom (studio)	3.3%
1 bedroom	4.1%
2 bedrooms	25.5%
3 bedrooms	39.9%
4 bedrooms	22.6%
5+ bedrooms	4.5%

Vehicles per household

Vehicles	% of households
No vehicle	5.6%
1 vehicle	12.8%
2 vehicles	34.9%
3 or more	46.7%

Heating fuel

Fuel type	%
Electricity	42.6%
Propane / LP gas	48.2%
Fuel oil	6.7%
Wood	2.1%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	96	49.2%
Cohabiting couple	17	8.7%
Male householder, no spouse	44	22.6%
Female householder, no spouse	38	19.5%
Households with children under 18	71	36.4%
Households with seniors (65+)	143	73.3%
Average household size	2.38

Marital status

Status	Male	Female
Never married	16.3%	42.6%
Married	51.1%	36.1%
Separated	0.5%	0.5%
Widowed	8.4%	14.8%
Divorced	23.7%	6.0%

Education

Less than 9th grade 19.5%

Some HS, no diploma 11.0%

HS graduate 26.6%

Some college, no degree 28.6%

Associate's degree 4.8%

Bachelor's degree 6.8%

Graduate / professional 2.5%

Metric	%
HS diploma or higher	69.4%
Bachelor's or higher	9.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	31	54.4%
Elementary school	13	22.8%
High school	12	21.1%
College / grad school	1	1.8%

Employment

Industry of employment

Manufacturing 29.8%

Agriculture & mining 21.1%

Education & healthcare 14.5%

Construction 12.3%

Retail trade 10.5%

Arts, food & hospitality 5.7%

Finance & real estate 2.2%

Public administration 1.3%

Wholesale trade 0.9%

Transportation & utilities 0.9%

Professional & management 0.9%

Occupation

Category	%
Management, business & arts	13.6%
Service	12.3%
Sales & office	18.4%
Natural resources & construction	13.2%
Production & transportation	42.5%

Employment type

Type	%
Private sector	77.6%
Government	9.2%
Self-employed	13.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	78.4%
Carpool	19.8%
Public transit	0.0%
Walk	0.0%
Work from home	0.5%
Other means	1.4%
Avg commute (minutes)	46.1

Poverty

All people 3.7%

Under 18 years 2.9%

18 and over 3.8%

Married-couple families 0.0%

Female-led households 14.3%

Income support

Source	% of households
Social Security	68.7%
Retirement income	32.3%
Supplemental Security	0.5%
Cash public assistance	1.0%
Food stamps / SNAP	28.2%

Health indicators

Condition	%
Obesity	36.6%
High blood pressure	36.8%
High cholesterol	36.0%
Diabetes	12.2%
Heart disease	7.8%
Stroke	3.4%
Asthma	8.8%
Arthritis	28.1%
Kidney disease	3.2%
Pulmonary disease	7.5%
Cancer	8.4%

Behavior / access	%
Smoking	16.6%
Binge drinking	19.3%
No physical activity	26.2%
Less than 7 hrs sleep	31.2%
Depression	16.7%
Fair or poor health	13.2%
Poor mental health	12.5%
Poor physical health	10.2%
No health insurance	9.1%
Visited doctor (checkup)	78.8%
Visited dentist	70.9%
Cholesterol screening	90.6%
Teeth loss	12.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	19	4.8%

Disability	%
Any disability	32.8%
Under 18	5.9%
18–64 years	15.7%
65 and over	68.9%

Health insurance coverage

Type	%
Private insurance	61.2%
Public insurance	51.1%
No insurance	1.7%
Uninsured under 19	2.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	452	97.4%
Spanish	68	15.0%
Other Indo-European	67	14.8%
Asian & Pacific Islander	0	0.0%
Other languages	1	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	397	85.6%
Born in same state	397	85.6%
Born in different state	275	59.3%
Foreign born	0	0.0%
Naturalized citizen	67	14.4%
Not a US citizen	67	100.0%

Ancestry

Ancestry	Count	%
French	28	6%
Italian	24	5.2%
Arab	22	4.7%

Ancestry	Count	%
English	21	4.5%
Dutch	16	3.4%
Polish	15	3.2%

Technology access

Metric	% of households
Computer access	42.0%
Internet access	92.8%

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

Frequently asked questions about ZIP code 51056

What city is ZIP code 51056 in?

ZIP code 51056 is primarily assigned to Smithland, Iowa.

What county is ZIP code 51056 in?

ZIP code 51056 falls within Woodbury County, Iowa.

Does ZIP code 51056 have a large retiree population?

69% of households in ZIP code 51056 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 51056 have an older population?

35% of residents in ZIP code 51056 are 65 or older, above the national average of ~17%.

Is ZIP code 51056 mostly owner-occupied?

97% of occupied units in ZIP code 51056 are owner-occupied, well above the national average.

How educated is the population of ZIP code 51056?

9% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What timezone is ZIP code 51056 in?

ZIP code 51056 observes the CST timezone.