PlainZIP

Onslow, IA · standard

ZIP Code 52321

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

404
5/sq mi
$77,708
Median income
$131,300
Median home value
13.5%
Bachelor's or higher

The verdict

Onslow pairs an above-median household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.

Top 41%
household income, US ZIPs
20th pct
home value, US ZIPs
5
people per sq mi
80%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 52321 against every reporting US ZIP.

ZIP code 52321 is a sparsely populated ZIP (a standard USPS delivery area) in Onslow, Jones County, Iowa, home to just 404 residents across 77.7 square miles, a density of 5 people per square mile, in the Chicago time zone.

ZIP 52321 lands in the middle-income range, with a median household income of $77,708 (1% above the Iowa average), while per-capita income is $29,969. The poverty rate stands at 21.0% and the unemployment rate at 0.0%. Housing costs here run $131,300 for a typical home value (25% below the state average), with rent averaging $861 a month; 80.1% of homes are owner-occupied.

Formal educational attainment runs low here: just 13.5% of adults hold a bachelor's degree or higher, the median age is 40.2, and the average commute is -. Beyond these figures, 5 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Jones County, letting you compare 52321 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 →

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 52321, Onslow, 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

404

Population

77.7

Area (sq mi)

5

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 52321?

40.2

Median Age

58.0%

Male

42.0%

Female

0.0%

Foreign-Born

White 93.4%
African American 3.3%
Asian 0.0%
American Indian or Alaska Native 1.3%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 2.0%
Hispanic or Latino 2.0%

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?

$77,708

Median Household Income

+1% vs state

$29,969

Per Capita Income

21.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 52321 ranks nationally

Onslow, IA household income vs. every US ZIP code

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

$77,708 Top 41% higher than 59% 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%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $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 61.5%
Bachelor's Degree or Higher 13.5%

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

What does housing look like?

162

Total Housing Units

146

Occupied Units

16

Vacant Units

2.71

Avg Household Size

Occupancy Type

Owner 80.1%
Renter 19.9%

$131,300

Median Home Value

-25% vs state

$861

Median Rent

1956

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 5 business establishments in ZIP 52321, employing approximately 13 people with a combined annual payroll of $2,068,000.

5

Businesses

13

Employees

$2.1M

Annual Payroll

0

Industry Sectors

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 52321 vs 52362 →

ZIP 52321 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 52321 ranks #4 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 52321 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 52321 ranks #3 of 6 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
52362 Wyoming, IA 1,041 5.7 mi
52309 Monmouth, IA 397 5.1 mi
52212 Center Junction, IA 285 5.9 mi
52033 Cascade, IA 3,202 9.2 mi
52032 Bernard, IA 1,456 12.3 mi

More ZIP Codes in Jones County

52205 standard
Anamosa, IA
Pop: 8,682
52310 standard
Monticello, IA
Pop: 6,431
52320 standard
Olin, IA
Pop: 1,203
52362 standard
Wyoming, IA
Pop: 1,041
52323 standard
Oxford Junction, IA
Pop: 867
52305 standard
Martelle, IA
Pop: 629

Related Areas

Jones County Onslow, IA Iowa

Frequently Asked Questions

What county is ZIP code 52321 in? ▼
ZIP code 52321 (Onslow) is located in Jones County, Iowa. Jones County contains multiple ZIP codes, see the full list at /counties/jones-ia.
What is the population of ZIP code 52321? ▼
ZIP code 52321 in Onslow, IA has a population of 404 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 52321? ▼
The median household income in ZIP 52321 is $77,708, which is 2% above the national average of $76,288.
What is the average home value in ZIP 52321? ▼
The median home value in ZIP 52321 is $131,300, which is 53% below the national average of $278,155.
What is the demographic makeup of ZIP 52321? ▼
The largest racial group in ZIP 52321 is White at 93.4%. Hispanic or Latino residents make up 2.0% of the population.
How many businesses are in ZIP code 52321? ▼
ZIP code 52321 has 5 business establishments employing approximately 13 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 52321? ▼
In ZIP code 52321, 61.5% of residents aged 25+ have a high school diploma or higher, and 13.5% 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 52321? ▼
In ZIP code 52321, approximately 80.1% of occupied housing units are owner-occupied and 19.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 52321? ▼
The poverty rate in ZIP code 52321 is 21.0% 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.