51355 ZIP Code — Okoboji, IA

Dickinson County, Iowa

ZIP code 51355 is located in Okoboji, Iowa, within Dickinson County. It covers approximately 2.54 square miles and serves a population of 877 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51355

The housing stock consists of a mix of housing types. Most homes were built in the pre-1940, giving the area an established character. Median home value is $425,000. Owner-occupancy sits near the national average at 75%.

The gap between median ($55,238) and mean household income suggests income inequality — a small number of higher earners pull the average up. 62% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with retail trade as the leading industry. The average commute of 17 minutes is near the national average.

Educational attainment is near the national average, with 37% of residents holding a bachelor's degree or higher.

877

population

2.54

sq mi land

Standard

ZIP type

Central (CT)

timezone

51355 ZIP code map

Cities in ZIP code 51355

Below are the cities the US Postal Service accepts for ZIP code 51355. Using any city not on this list may result in mail delivery delays.

City	Status
Okoboji	Preferred

Nearby ZIP codes

51331 Arnolds Park (2.4 mi) 51360 Spirit Lake (2.8 mi) 51351 Milford (6.1 mi) 51347 Lake Park (8.2 mi) 51364 Terril (10.7 mi) 51345 Harris (15.1 mi) 56150 Lakefield (16.9 mi) 51338 Everly (17.1 mi) 51301 Spencer (17.7 mi) 51334 Estherville (18.7 mi) 51333 Dickens (19.2 mi)

Demographics updated 05/2026

Population
Total population	877
Population density	345 / sq mi
State FIPS	19
County FIPS	059

Geography
Land area	2.54 sq mi
Water area	1.19 sq mi
Latitude	43.3929
Longitude	-95.1413
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	46.2%	39.9%	40.1%
$50k – $100k	28.7%	34.8%	33.4%
$100k – $200k	15.0%	19.6%	21.5%
Over $200k	10.1%	5.7%	5.0%

Demographics & statistics

877

Population

345

People per sq mi

63.1

Median age

$55,238

Median household income

$63,103

Per capita income

$425,000

Median home value

$910

Median monthly rent

74.6%

Home ownership

14.4%

Poverty rate

2.1%

Unemployment

1,411

Housing units

36.6%

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

100

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	98	11.2%
18 and over	779	88.8%
65 and over	379	43.2%
Median age	63.1 years

Race & ethnicity

White 88.8%

Two or more races 4%

Asian 3.9%

Hispanic or Latino 3.3%

Black or African American 0.1%

Group	Count	%
White	805	88.8%
Two or more races	36	4%
Asian	35	3.9%
Hispanic or Latino	30	3.3%
Black or African American	1	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.2%	39.9%	40.1%
$50k – $100k	28.7%	34.8%	33.4%
$100k – $200k	15.0%	19.6%	21.5%
Over $200k	10.1%	5.7%	5.0%

Under $10k 5.6%

$10k–$15k 1.4%

$15k–$25k 9.1%

$25k–$35k 11.3%

$35k–$50k 21.6%

$50k–$75k 14.3%

$75k–$100k 11.3%

$100k–$150k 9.1%

$150k–$200k 2.0%

$200k+ 14.3%

Range	% of households
Under $10k	5.6%
$10k–$15k	1.4%
$15k–$25k	9.1%
$25k–$35k	11.3%
$35k–$50k	21.6%
$50k–$75k	14.3%
$75k–$100k	11.3%
$100k–$150k	9.1%
$150k–$200k	2.0%
$200k+	14.3%
Median income	$55,238

Housing

Home values

Under $50k 6.4%

$50k–$100k 0.8%

$100k–$150k 5.6%

$150k–$200k 13.3%

$200k–$300k 16.8%

$300k–$500k 16.0%

$500k–$1M 30.9%

$1M+ 10.4%

Housing overview

Metric	Value
Median home value	$425,000
Median rent / month	$910
Owner occupied	74.6%
Renter occupied	25.4%
Vacant	67.3%
Single-family detached	56.0%
Large apartment buildings	1.0%
Mobile homes	11.6%
Median rooms	5.0
Avg household size (owned)	1.73

Year built

Era	%
2020 or later	1.2%
2010–2019	6.9%
2000–2009	18.5%
1990–1999	15.0%
1980–1989	4.6%
1970–1979	14.6%
1960–1969	8.6%
1950–1959	5.5%
1940–1949	6.2%
1939 or earlier	18.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.6%
1 bedroom	4.7%
2 bedrooms	40.5%
3 bedrooms	22.5%
4 bedrooms	13.5%
5+ bedrooms	18.1%

Vehicles per household

Vehicles	% of households
No vehicle	5.4%
1 vehicle	46.2%
2 vehicles	29.6%
3 or more	18.8%

Heating fuel

Fuel type	%
Utility gas	75.4%
Electricity	22.2%
Propane / LP gas	0.8%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	164	32.5%
Cohabiting couple	4	0.8%
Male householder, no spouse	95	18.8%
Female householder, no spouse	241	47.8%
Households with children under 18	34	6.7%
Households with seniors (65+)	296	58.7%
Average household size	1.69

Marital status

Status	Male	Female
Never married	42.9%	8.8%
Married	50.6%	39.4%
Separated	0.0%	0.7%
Widowed	1.8%	29.1%
Divorced	4.7%	22.1%

Education

Less than 9th grade 0.4%

Some HS, no diploma 1.1%

HS graduate 30.2%

Some college, no degree 19.9%

Associate's degree 11.8%

Bachelor's degree 25.5%

Graduate / professional 11.1%

Metric	%
HS diploma or higher	98.4%
Bachelor's or higher	36.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	13	11.9%
Elementary school	40	36.7%
High school	3	2.8%
College / grad school	53	48.6%

Employment

Industry of employment

Retail trade 24.4%

Education & healthcare 18.7%

Professional & management 12.2%

Arts, food & hospitality 9.6%

Other services 8.9%

Construction 7.9%

Finance & real estate 6.5%

Manufacturing 6.0%

Information 1.9%

Public administration 1.7%

Wholesale trade 1.0%

Transportation & utilities 1.0%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	37.1%
Service	21.1%
Sales & office	19.9%
Natural resources & construction	11.0%
Production & transportation	11.0%

Employment type

Type	%
Private sector	77.0%
Government	9.8%
Self-employed	12.7%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	77.4%
Carpool	2.0%
Public transit	0.0%
Walk	0.7%
Work from home	7.6%
Other means	12.3%
Avg commute (minutes)	17.0

Poverty

All people 14.4%

Under 18 years 20.2%

18 and over 13.7%

Married-couple families 2.4%

Female-led households 0.0%

Income support

Source	% of households
Social Security	61.7%
Retirement income	33.1%
Supplemental Security	7.3%
Cash public assistance	0.6%
Food stamps / SNAP	5.4%

Health indicators

Condition	%
Obesity	34.2%
High blood pressure	39.0%
High cholesterol	36.3%
Diabetes	11.1%
Heart disease	8.2%
Stroke	3.5%
Asthma	8.5%
Arthritis	29.5%
Kidney disease	3.4%
Pulmonary disease	6.9%
Cancer	9.9%

Behavior / access	%
Smoking	12.8%
Binge drinking	18.0%
No physical activity	21.9%
Less than 7 hrs sleep	26.2%
Depression	15.3%
Fair or poor health	11.6%
Poor mental health	10.7%
Poor physical health	9.2%
No health insurance	7.1%
Visited doctor (checkup)	78.7%
Visited dentist	72.8%
Cholesterol screening	92.5%
Teeth loss	9.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	54	6.9%

Disability	%
Any disability	11.4%
Under 18	0.0%
18–64 years	2.8%
65 and over	23.5%

Health insurance coverage

Type	%
Private insurance	65.0%
Public insurance	56.7%
No insurance	2.4%
Uninsured under 19	9.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	853	97.3%
Spanish	27	3.2%
Other Indo-European	0	0.0%
Asian & Pacific Islander	3	0.4%
Other languages	24	2.8%

Place of birth & citizenship

Origin	Count	%
Native born (US)	812	92.6%
Born in same state	812	92.6%
Born in different state	610	69.6%
Foreign born	0	0.0%
Naturalized citizen	65	7.4%
Not a US citizen	6	9.2%

Ancestry

Ancestry	Count	%
Italian	154	17.6%
French	109	12.4%
Arab	85	9.7%
Polish	73	8.3%

Ancestry	Count	%
English	44	5%
Dutch	33	3.8%
German	2	0.2%

Technology access

Metric	% of households
Computer access	57.5%
Internet access	98.0%

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

Frequently asked questions about ZIP code 51355

What city is ZIP code 51355 in?

ZIP code 51355 is primarily assigned to Okoboji, Iowa.

What county is ZIP code 51355 in?

ZIP code 51355 falls within Dickinson County, Iowa.

Does ZIP code 51355 have an older population?

43% of residents in ZIP code 51355 are 65 or older, above the national average of ~17%.

Does ZIP code 51355 have a large retiree population?

62% of households in ZIP code 51355 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 51355?

The median home value in ZIP code 51355 is $425,000.

What is the population of ZIP code 51355?

ZIP code 51355 has an estimated population of 877 residents, with a density of 345 people per square mile.

What timezone is ZIP code 51355 in?

ZIP code 51355 observes the CST timezone.