PlainZIP

Castana, IA · standard

ZIP Code 51010

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

456
3/sq mi
$89,063
Median income
$114,800
Median home value
11.0%
Bachelor's or higher

The verdict

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

Top 28%
household income, US ZIPs
15th pct
home value, US ZIPs
3
people per sq mi
88%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51010 against every reporting US ZIP.

ZIP code 51010 is a sparsely populated ZIP (a standard USPS delivery area) in Castana, Monona County, Iowa, home to just 456 residents across 175.4 square miles, a density of 3 people per square mile, in the Chicago time zone.

ZIP 51010 lands in the middle-income range, with a median household income of $89,063 (16% above the Iowa average), while per-capita income is $40,064. 2.4% of residents live below the poverty line, and the unemployment rate reads 1.1%. Housing costs here run $114,800 for a typical home value (35% below the state average), with rent averaging $99 a month; 87.5% of homes are owner-occupied.

Formal educational attainment runs low here: just 11.0% of adults hold a bachelor's degree or higher, the median age is 46.7, and the average commute is 35 minutes. A geography-based comparison follows: 4 ZIP codes within about 10 miles of 51010, plus 6 more within Monona County, give a clearer read than the national average 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 51010, Castana, 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

456

Population

175.4

Area (sq mi)

3

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 51010?

46.7

Median Age

51.8%

Male

48.2%

Female

0.0%

Foreign-Born

White 94.4%
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 5.6%
Hispanic or Latino 4.0%

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?

$89,063

Median Household Income

+16% vs state

$40,064

Per Capita Income

2.4%

Poverty Rate

1.1%

Unemployment Rate

35.0 min

Mean Commute Time

How ZIP 51010 ranks nationally

Castana, IA household income vs. every US ZIP code

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

$89,063 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 52.2%
Bachelor's Degree or Higher 11.0%

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

What does housing look like?

262

Total Housing Units

208

Occupied Units

54

Vacant Units

2.04

Avg Household Size

Occupancy Type

Owner 87.5%
Renter 12.5%

$114,800

Median Home Value

-35% vs state

$99

Median Rent

1958

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 4 business establishments in ZIP 51010, employing approximately 3 people with a combined annual payroll of $51,000.

4

Businesses

3

Employees

$51K

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 51010 vs 51051 →

ZIP 51010 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 51010 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 51010 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 51010 ranks #2 of 5 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
51051 Rodney, IA 90 8.5 mi
51034 Mapleton, IA 1,820 7.8 mi
51056 Smithland, IA 478 10.3 mi
51572 Soldier, IA 398 9.2 mi

More ZIP Codes in Monona County

51040 standard
Onawa, IA
Pop: 3,712
51034 standard
Mapleton, IA
Pop: 1,820
51063 standard
Whiting, IA
Pop: 1,100
51060 standard
Ute, IA
Pop: 615
51558 standard
Moorhead, IA
Pop: 560
51572 standard
Soldier, IA
Pop: 398

Related Areas

Monona County Castana, IA Iowa

Frequently Asked Questions

What county is ZIP code 51010 in? ▼
ZIP code 51010 (Castana) is located in Monona County, Iowa. Monona County contains multiple ZIP codes, see the full list at /counties/monona-ia.
What is the population of ZIP code 51010? ▼
ZIP code 51010 in Castana, IA has a population of 456 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51010? ▼
The median household income in ZIP 51010 is $89,063, which is 17% above the national average of $76,288.
What is the average home value in ZIP 51010? ▼
The median home value in ZIP 51010 is $114,800, which is 59% below the national average of $278,155.
What is the demographic makeup of ZIP 51010? ▼
The largest racial group in ZIP 51010 is White at 94.4%. Hispanic or Latino residents make up 4.0% of the population.
How many businesses are in ZIP code 51010? ▼
ZIP code 51010 has 4 business establishments employing approximately 3 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 51010? ▼
In ZIP code 51010, 52.2% of residents aged 25+ have a high school diploma or higher, and 11.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 51010? ▼
The mean commute time for workers in ZIP code 51010 is 35.0 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 51010? ▼
In ZIP code 51010, approximately 87.5% of occupied housing units are owner-occupied and 12.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51010? ▼
The poverty rate in ZIP code 51010 is 2.4% 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.