PlainZIP

Arnolds Park, IA · standard

ZIP Code 51331

Dickinson County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,140
262/sq mi
$89,167
Median income
$448,800
Median home value
40.7%
Bachelor's or higher

The verdict

Arnolds Park pairs an above-median household income with upper-quartile home values, in a low-density, homeowner-dominated area.

Top 28%
household income, US ZIPs
Top 16%
home value, US ZIPs
262
people per sq mi
89%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51331 against every reporting US ZIP.

ZIP code 51331 is a sparsely populated ZIP (a standard USPS delivery area) in Arnolds Park, Dickinson County, Iowa, home to just 1,140 residents across 4.4 square miles, a density of 262 people per square mile, in the Chicago time zone.

ZIP 51331 lands in the middle-income range, with a median household income of $89,167 (16% above the Iowa average), while per-capita income is $70,729. Poverty here runs at 5.8%, with unemployment measured at 0.5%. Median home value sits at $448,800 (156% above the state average), median rent at $497 a month, and owner-occupancy at 89.3%.

A solid share of residents have a four-year degree: 40.7% of adults hold a bachelor's degree or higher, the median age is 64.8, and the average commute is -. Beyond these figures, 3 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Dickinson County, letting you compare 51331 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 51331

Top 5 sectors by establishment count in Arnolds Park, IA

Which industries have the most business establishments in ZIP 51331.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 51331, Arnolds Park, IA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

1,140

Population

4.4

Area (sq mi)

262

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 51331?

64.8

Median Age

47.3%

Male

52.7%

Female

0.5%

Foreign-Born

White 98.6%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 1.4%
Hispanic or Latino 0.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$89,167

Median Household Income

+16% vs state

$70,729

Per Capita Income

5.8%

Poverty Rate

0.5%

Unemployment Rate

How ZIP 51331 ranks nationally

Arnolds Park, IA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$89,167 Top 28% higher than 72% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 66.6%
Bachelor's Degree or Higher 40.7%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

1,618

Total Housing Units

522

Occupied Units

1,096

Vacant Units

1.79

Avg Household Size

Occupancy Type

Owner 89.3%
Renter 10.7%

$448,800

Median Home Value

+156% vs state

$497

Median Rent

1997

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 92 business establishments in ZIP 51331, employing approximately 605 people with a combined annual payroll of $27,108,000.

92

Businesses

605

Employees

$27.1M

Annual Payroll

9

Industry Sectors

Industry Establishments % of Total
Accommodation and food services 33 35.9%
Retail trade 15 16.3%
Other services (except public administration) 8 8.7%
Real estate and rental and leasing 6 6.5%
Arts, entertainment, and recreation 6 6.5%
Transportation and warehousing 5 5.4%
Finance and insurance 5 5.4%
Construction 4 4.3%
Administrative and support and waste management and remediation services 4 4.3%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 51331 vs 51355 →

ZIP 51331 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 51331 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 51331 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 51331 ranks the highest of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
51355 Okoboji, IA 874 1.8 mi
51351 Milford, IA 4,365 4.4 mi
51360 Spirit Lake, IA 8,031 5.8 mi

More ZIP Codes in Dickinson County

51360 standard
Spirit Lake, IA
Pop: 8,031
51351 standard
Milford, IA
Pop: 4,365
51347 standard
Lake Park, IA
Pop: 1,431
51355 standard
Okoboji, IA
Pop: 874
51364 standard
Terril, IA
Pop: 690
51363 standard
Superior, IA
Pop: 130

Related Areas

Dickinson County Arnolds Park, IA Iowa

Frequently Asked Questions

What county is ZIP code 51331 in? ▼
ZIP code 51331 (Arnolds Park) is located in Dickinson County, Iowa. Dickinson County contains multiple ZIP codes, see the full list at /counties/dickinson-ia.
What is the population of ZIP code 51331? ▼
ZIP code 51331 in Arnolds Park, IA has a population of 1,140 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51331? ▼
The median household income in ZIP 51331 is $89,167, which is 17% above the national average of $76,288.
What is the average home value in ZIP 51331? ▼
The median home value in ZIP 51331 is $448,800, which is 61% above the national average of $278,155.
What is the demographic makeup of ZIP 51331? ▼
The largest racial group in ZIP 51331 is White at 98.6%. Hispanic or Latino residents make up 0.7% of the population.
How many businesses are in ZIP code 51331? ▼
ZIP code 51331 has 92 business establishments employing approximately 605 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51331? ▼
The top industries by establishment count in ZIP 51331 are: Accommodation and food services (33), Retail trade (15), Other services (except public administration) (8). There are 9 industry sectors represented in total.
What is the education level in ZIP code 51331? ▼
In ZIP code 51331, 66.6% of residents aged 25+ have a high school diploma or higher, and 40.7% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 51331? ▼
In ZIP code 51331, approximately 89.3% of occupied housing units are owner-occupied and 10.7% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51331? ▼
The poverty rate in ZIP code 51331 is 5.8% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.