PlainZIP

Auburn, IA · standard

ZIP Code 51433

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

676
5/sq mi
$68,125
Median income
$153,200
Median home value
11.8%
Bachelor's or higher

The verdict

Auburn pairs a below-median household income with below-median home values, in a rural, mixed-tenure area.

44th pct
household income, US ZIPs
27th pct
home value, US ZIPs
5
people per sq mi
49%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51433 against every reporting US ZIP.

ZIP code 51433 is a sparsely populated ZIP (a standard USPS delivery area) in Auburn, Sac County, Iowa, home to just 676 residents across 147.0 square miles, a density of 5 people per square mile, in the Chicago time zone.

ZIP 51433 reports a modest median household income of $68,125 (11% below the Iowa average), while per-capita income is $32,473. 20.8% of residents live below the poverty line, and the unemployment rate reads 0.6%. The typical home here is valued at $153,200 (13% below the state average); renters pay a median of $774 monthly, and 48.5% of units are owner-occupied.

Formal educational attainment runs low here: just 11.8% of adults hold a bachelor's degree or higher, the median age is 38.2, and the average commute is -. We also surface 3 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Sac County, so you can benchmark 51433 against its immediate geography rather than a 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 51433, Auburn, 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

676

Population

147.0

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 51433?

38.2

Median Age

41.6%

Male

58.4%

Female

0.0%

Foreign-Born

White 99.1%
African American 0.9%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 0.0%
Hispanic or Latino 1.6%

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?

$68,125

Median Household Income

-11% vs state

$32,473

Per Capita Income

20.8%

Poverty Rate

0.6%

Unemployment Rate

How ZIP 51433 ranks nationally

Auburn, IA household income vs. every US ZIP code

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

$68,125 44th percentile higher than 44% 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 44.6%
Bachelor's Degree or Higher 11.8%

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

What does housing look like?

244

Total Housing Units

227

Occupied Units

17

Vacant Units

2.50

Avg Household Size

Occupancy Type

Owner 48.5%
Renter 51.5%

$153,200

Median Home Value

-13% vs state

$774

Median Rent

1938

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 14 business establishments in ZIP 51433, employing approximately 63 people with a combined annual payroll of $2,808,000.

14

Businesses

63

Employees

$2.8M

Annual Payroll

2

Industry Sectors

Industry Establishments % of Total
Wholesale trade 3 21.4%
Transportation and warehousing 3 21.4%

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 51433 vs 51449 →

ZIP 51433 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 51433 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 51433 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 51433 ranks #2 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
51449 Lake City, IA 2,128 7.0 mi
50561 Lytton, IA 520 10.3 mi
51436 Breda, IA 904 9.7 mi

More ZIP Codes in Sac County

50583 standard
Sac City, IA
Pop: 2,855
51450 standard
Lake View, IA
Pop: 1,583
51458 standard
Odebolt, IA
Pop: 1,467
51053 standard
Schaller, IA
Pop: 1,161
51466 standard
Wall Lake, IA
Pop: 1,092
50535 standard
Early, IA
Pop: 885

Related Areas

Sac County Auburn, IA Iowa

Frequently Asked Questions

What county is ZIP code 51433 in? ▼
ZIP code 51433 (Auburn) is located in Sac County, Iowa. Sac County contains multiple ZIP codes, see the full list at /counties/sac-ia.
What is the population of ZIP code 51433? ▼
ZIP code 51433 in Auburn, IA has a population of 676 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51433? ▼
The median household income in ZIP 51433 is $68,125, which is 11% below the national average of $76,288.
What is the average home value in ZIP 51433? ▼
The median home value in ZIP 51433 is $153,200, which is 45% below the national average of $278,155.
What is the demographic makeup of ZIP 51433? ▼
The largest racial group in ZIP 51433 is White at 99.1%. Hispanic or Latino residents make up 1.6% of the population.
How many businesses are in ZIP code 51433? ▼
ZIP code 51433 has 14 business establishments employing approximately 63 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 51433? ▼
In ZIP code 51433, 44.6% of residents aged 25+ have a high school diploma or higher, and 11.8% 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 51433? ▼
In ZIP code 51433, approximately 48.5% of occupied housing units are owner-occupied and 51.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51433? ▼
The poverty rate in ZIP code 51433 is 20.8% 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.