51055 ZIP Code — Sloan, IA

Woodbury County, Iowa

ZIP code 51055 is located in Sloan, Iowa, within Woodbury County. It covers approximately 62.76 square miles and serves a population of 1,271 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51055

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 $185,400. Owner-occupancy is high at 78%, well above the national average.

Median household income is $76,875. 38% 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 21 minutes is near the national average.

Educational attainment is near the national average, with 30% of residents holding a bachelor's degree or higher.

Overall, ZIP code 51055 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,271

population

62.76

sq mi land

Standard

ZIP type

Central (CT)

timezone

51055 ZIP code map

Cities in ZIP code 51055

Below are the cities the US Postal Service accepts for ZIP code 51055. Using any city not on this list may result in mail delivery delays.

City	Status
Sloan	Preferred

Nearby ZIP codes

51063 Whiting (6.3 mi) 51052 Salix (7.5 mi) 68039 Macy (8.2 mi) 51026 Hornick (8.7 mi) 68071 Winnebago (12 mi) 51054 Sergeant Bluff (12.1 mi) 68030 Homer (12.9 mi) 68067 Walthill (12.9 mi) 51007 Bronson (13.3 mi) 51051 Rodney (14.5 mi) 51056 Smithland (14.8 mi) 51111 Sioux City (15.7 mi)

Demographics updated 05/2026

Population
Total population	1,271
Population density	20 / sq mi
State FIPS	19
County FIPS	193

Geography
Land area	62.76 sq mi
Water area	0.81 sq mi
Latitude	42.2145
Longitude	-96.2427
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	33.6%	40.6%	40.1%
$50k – $100k	37.0%	33.9%	33.4%
$100k – $200k	25.5%	21.3%	21.5%
Over $200k	3.9%	4.2%	5.0%

Demographics & statistics

1,271

Population

People per sq mi

41.9

Median age

$76,875

Median household income

$35,433

Per capita income

$185,400

Median home value

$938

Median monthly rent

77.7%

Home ownership

12.7%

Poverty rate

7.9%

Unemployment

401

Housing units

29.9%

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	326	25.6%
18 and over	945	74.4%
65 and over	241	19.0%
Median age	41.9 years

Race & ethnicity

White 90.2%

American Indian / Alaska Native 5.9%

Two or more races 2.1%

Hispanic or Latino 1.1%

Other race 0.7%

Group	Count	%
White	1,159	90.2%
American Indian / Alaska Native	76	5.9%
Two or more races	27	2.1%
Hispanic or Latino	14	1.1%
Other race	9	0.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.6%	40.6%	40.1%
$50k – $100k	37.0%	33.9%	33.4%
$100k – $200k	25.5%	21.3%	21.5%
Over $200k	3.9%	4.2%	5.0%

Under $10k 4.1%

$10k–$15k 3.9%

$15k–$25k 10.5%

$25k–$35k 3.4%

$35k–$50k 12.8%

$50k–$75k 15.0%

$75k–$100k 11.2%

$100k–$150k 22.3%

$150k–$200k 9.3%

$200k+ 7.5%

Range	% of households
Under $10k	4.1%
$10k–$15k	3.9%
$15k–$25k	10.5%
$25k–$35k	3.4%
$35k–$50k	12.8%
$50k–$75k	15.0%
$75k–$100k	11.2%
$100k–$150k	22.3%
$150k–$200k	9.3%
$200k+	7.5%
Median income	$76,875

Housing

Home values

Under $50k 7.6%

$50k–$100k 10.2%

$100k–$150k 17.8%

$150k–$200k 20.6%

$200k–$300k 29.9%

$300k–$500k 12.7%

$500k–$1M 1.3%

Housing overview

Metric	Value
Median home value	$185,400
Median rent / month	$938
Owner occupied	77.7%
Renter occupied	22.3%
Vacant	1.4%
Single-family detached	89.7%
Large apartment buildings	0.0%
Mobile homes	1.6%
Median rooms	6.4
Avg household size (owned)	2.37

Year built

Era	%
2020 or later	0.0%
2010–2019	7.2%
2000–2009	7.0%
1990–1999	7.0%
1980–1989	11.7%
1970–1979	14.6%
1960–1969	10.5%
1950–1959	7.4%
1940–1949	6.0%
1939 or earlier	28.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.1%
2 bedrooms	20.6%
3 bedrooms	48.2%
4 bedrooms	19.3%
5+ bedrooms	6.8%

Vehicles per household

Vehicles	% of households
No vehicle	2.0%
1 vehicle	22.5%
2 vehicles	37.3%
3 or more	38.3%

Heating fuel

Fuel type	%
Utility gas	55.0%
Electricity	36.9%
Propane / LP gas	6.7%

Households & families

Household type	Count	%
Married-couple family	276	54.4%
Cohabiting couple	47	9.3%
Male householder, no spouse	65	12.8%
Female householder, no spouse	119	23.5%
Households with children under 18	144	28.4%
Households with seniors (65+)	181	35.7%
Average household size	2.51

Marital status

Status	Male	Female
Never married	24.6%	28.2%
Married	65.0%	53.1%
Separated	1.3%	0.0%
Widowed	1.1%	10.6%
Divorced	8.1%	8.1%

Education

Less than 9th grade 0.5%

Some HS, no diploma 0.1%

HS graduate 35.4%

Some college, no degree 23.7%

Associate's degree 10.3%

Bachelor's degree 19.2%

Graduate / professional 10.7%

Metric	%
HS diploma or higher	99.4%
Bachelor's or higher	29.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	22	7.3%
Kindergarten	24	7.9%
Elementary school	136	45.0%
High school	87	28.8%
College / grad school	33	10.9%

Employment

Industry of employment

Education & healthcare 35.6%

Manufacturing 12.0%

Retail trade 11.6%

Transportation & utilities 7.6%

Other services 6.2%

Finance & real estate 5.6%

Professional & management 4.6%

Agriculture & mining 4.0%

Information 3.2%

Arts, food & hospitality 3.0%

Wholesale trade 2.5%

Public administration 2.3%

Construction 1.9%

Occupation

Category	%
Management, business & arts	41.7%
Service	17.3%
Sales & office	12.3%
Natural resources & construction	10.0%
Production & transportation	18.7%

Employment type

Type	%
Private sector	73.9%
Government	17.4%
Self-employed	8.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	85.1%
Carpool	2.6%
Public transit	0.0%
Walk	3.2%
Work from home	7.5%
Other means	1.6%
Avg commute (minutes)	20.8

Poverty

All people 12.7%

Under 18 years 18.1%

18 and over 10.8%

Married-couple families 5.4%

Female-led households 17.9%

Income support

Source	% of households
Social Security	37.7%
Retirement income	19.7%
Supplemental Security	1.4%
Cash public assistance	1.8%
Food stamps / SNAP	3.9%

Health indicators

Condition	%
Obesity	36.5%
High blood pressure	33.8%
High cholesterol	34.4%
Diabetes	10.8%
Heart disease	6.6%
Stroke	3.0%
Asthma	9.1%
Arthritis	25.5%
Kidney disease	2.9%
Pulmonary disease	6.8%
Cancer	7.5%

Behavior / access	%
Smoking	17.4%
Binge drinking	20.8%
No physical activity	25.3%
Less than 7 hrs sleep	31.7%
Depression	17.5%
Fair or poor health	12.4%
Poor mental health	13.4%
Poor physical health	9.7%
No health insurance	9.2%
Visited doctor (checkup)	77.1%
Visited dentist	70.0%
Cholesterol screening	89.5%
Teeth loss	12.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	36	3.9%

Disability	%
Any disability	9.4%
Under 18	0.0%
18–64 years	8.1%
65 and over	25.7%

Health insurance coverage

Type	%
Private insurance	65.2%
Public insurance	37.8%
No insurance	7.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,172	92.2%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,263	99.4%
Born in same state	1,263	99.4%
Born in different state	1,012	79.6%
Foreign born	0	0.0%
Naturalized citizen	8	0.6%
Not a US citizen	3	37.5%

Ancestry

Ancestry	Count	%
French	115	9%
Italian	89	7%
Polish	49	3.9%
Arab	49	3.9%

Ancestry	Count	%
Dutch	14	1.1%
English	10	0.8%
German	5	0.4%

Technology access

Metric	% of households
Computer access	39.9%
Internet access	93.5%

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

Frequently asked questions about ZIP code 51055

What city is ZIP code 51055 in?

ZIP code 51055 is primarily assigned to Sloan, Iowa.

What county is ZIP code 51055 in?

ZIP code 51055 falls within Woodbury County, Iowa.

Does ZIP code 51055 have a large retiree population?

38% of households in ZIP code 51055 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 51055?

The median home value in ZIP code 51055 is $185,400.

What is the population of ZIP code 51055?

ZIP code 51055 has an estimated population of 1,271 residents, with a density of 20 people per square mile.

What is the median household income in ZIP code 51055?

The median household income in ZIP code 51055 is $76,875, above the national median of ~$75,000.

What timezone is ZIP code 51055 in?

ZIP code 51055 observes the CST timezone.