PlainZIP

Doon, IA · standard

ZIP Code 51235

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

1,079
7/sq mi
$71,016
Median income
$240,700
Median home value
7.6%
Bachelor's or higher

The verdict

Doon pairs a below-median household income with above-median home values, in a rural, homeowner-dominated area.

48th pct
household income, US ZIPs
Top 45%
home value, US ZIPs
7
people per sq mi
74%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51235 against every reporting US ZIP.

ZIP code 51235 is a sparsely populated ZIP (a standard USPS delivery area) in Doon, Lyon County, Iowa, home to just 1,079 residents across 145.8 square miles, a density of 7 people per square mile, in the Chicago time zone.

ZIP 51235 lands in the middle-income range, with a median household income of $71,016 (7% below the Iowa average), while per-capita income is $40,773. Local economic indicators show a 9.8% poverty rate alongside 9.3% unemployment. Median home value sits at $240,700 (37% above the state average), median rent at $531 a month, and owner-occupancy at 74.2%.

Formal educational attainment runs low here: just 7.6% of adults hold a bachelor's degree or higher, the median age is 37.1, and the average commute is -. To put 51235 in local context, 5 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Lyon County, for a geography-aware comparison.

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 51235

Top 5 sectors by establishment count in Doon, IA

Which industries have the most business establishments in ZIP 51235.

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 51235, Doon, 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

1,079

Population

145.8

Area (sq mi)

7

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 51235?

37.1

Median Age

53.6%

Male

46.4%

Female

1.9%

Foreign-Born

White 99.8%
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 0.2%
Hispanic or Latino 0.1%

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?

$71,016

Median Household Income

-7% vs state

$40,773

Per Capita Income

9.8%

Poverty Rate

9.3%

Unemployment Rate

How ZIP 51235 ranks nationally

Doon, IA household income vs. every US ZIP code

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

$71,016 48th percentile higher than 48% 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 65.9%
Bachelor's Degree or Higher 7.6%

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

What does housing look like?

411

Total Housing Units

411

Occupied Units

0

Vacant Units

2.45

Avg Household Size

Occupancy Type

Owner 74.2%
Renter 25.8%

$240,700

Median Home Value

+37% vs state

$531

Median Rent

1984

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 44 business establishments in ZIP 51235, employing approximately 178 people with a combined annual payroll of $8,855,000.

44

Businesses

178

Employees

$8.9M

Annual Payroll

6

Industry Sectors

Industry Establishments % of Total
Construction 9 20.4%
Other services (except public administration) 8 18.2%
Transportation and warehousing 7 15.9%
Retail trade 5 11.4%
Manufacturing 4 9.1%
Wholesale trade 4 9.1%

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 51235 vs 51239 →

ZIP 51235 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 51235 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 51235 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 51235 ranks #6 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
51239 Hull, IA 3,123 7.4 mi
51230 Alvord, IA 462 7.0 mi
51246 Rock Rapids, IA 3,844 9.6 mi
51247 Rock Valley, IA 4,870 9.4 mi
51242 Lester, IA 212 11.7 mi

More ZIP Codes in Lyon County

51246 standard
Rock Rapids, IA
Pop: 3,844
51240 standard
Inwood, IA
Pop: 1,746
51241 standard
Larchwood, IA
Pop: 1,737
51237 standard
George, IA
Pop: 1,703
51243 standard
Little Rock, IA
Pop: 807
51230 standard
Alvord, IA
Pop: 462

Related Areas

Lyon County Doon, IA Iowa

Frequently Asked Questions

What county is ZIP code 51235 in? ▼
ZIP code 51235 (Doon) is located in Lyon County, Iowa. Lyon County contains multiple ZIP codes, see the full list at /counties/lyon-ia.
What is the population of ZIP code 51235? ▼
ZIP code 51235 in Doon, IA has a population of 1,079 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51235? ▼
The median household income in ZIP 51235 is $71,016, which is 7% below the national average of $76,288.
What is the average home value in ZIP 51235? ▼
The median home value in ZIP 51235 is $240,700, which is 13% below the national average of $278,155.
What is the demographic makeup of ZIP 51235? ▼
The largest racial group in ZIP 51235 is White at 99.8%. Hispanic or Latino residents make up 0.1% of the population.
How many businesses are in ZIP code 51235? ▼
ZIP code 51235 has 44 business establishments employing approximately 178 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51235? ▼
The top industries by establishment count in ZIP 51235 are: Construction (9), Other services (except public administration) (8), Transportation and warehousing (7). There are 6 industry sectors represented in total.
What is the education level in ZIP code 51235? ▼
In ZIP code 51235, 65.9% of residents aged 25+ have a high school diploma or higher, and 7.6% 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 51235? ▼
In ZIP code 51235, approximately 74.2% of occupied housing units are owner-occupied and 25.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51235? ▼
The poverty rate in ZIP code 51235 is 9.8% 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.