Little Sioux, IA · standard
ZIP Code 51545
Harrison County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 378
- 3/sq mi Low-density area
- $70,313
- Median income Near-median income area
- $80,000
- Median home value Below-median home value
- 5.8%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Little Sioux pairs a below-median household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.
- 47th pct
- household income, US ZIPs
- 4th pct
- home value, US ZIPs
- 3
- people per sq mi
- 86%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51545 against every reporting US ZIP.
ZIP code 51545 is a sparsely populated ZIP (a standard USPS delivery area) in Little Sioux, Harrison County, Iowa, home to just 378 residents across 114.5 square miles, a density of 3 people per square mile, in the Chicago time zone.
ZIP 51545 lands in the middle-income range, with a median household income of $70,313 (8% below the average Iowa ZIP), while per-capita income is $32,551. The poverty rate is 16.1%, with unemployment at 0.8%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $80,000 (54% below the average Iowa ZIP), and median rent is $508; owner occupancy is 85.5%.
Formal educational attainment runs low here: just 5.8% of adults hold a bachelor's degree or higher, the median age is 58.7, and the average commute is -. The page also surfaces 3 ZIP codes within roughly 10 miles and 6 more in Harrison County, so 51545 can be compared with both its immediate and county-level context.
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 51545, Little Sioux, 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
378
Population
114.5
Area (sq mi)
3
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 51545?
58.7
Median Age
46.4%
Male
53.6%
Female
0.0%
Foreign-Born
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?
$70,313
Median Household Income
-8% vs state ZIP avg
$32,551
Per Capita Income
16.1%
Poverty Rate
0.8%
Unemployment Rate
How ZIP 51545 ranks among Iowa ZIPs
Little Sioux, IA household income vs. every Iowa ZIP code
Median household income among 911 reporting Iowa ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$70,313 40th percentile higher than 40% of 911 Iowa ZIPs
Each bar is a $20K-wide band; taller bars hold more Iowa 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
173housing units
173
Total Housing Units
131
Occupied Units
42
Vacant Units
2.04
Avg Household Size
Occupancy Type
$80,000
Median Home Value
-54% vs state ZIP avg
$508
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 4 business establishments in ZIP 51545, employing approximately 7 people with a combined annual payroll of $133,000.
4
Businesses
7
Employees
$133K
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 51545 vs 51523 →
ZIP 51545 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 51557
Mondamin (51557)
873 residents
- 51564
Pisgah (51564)
501 residents
- 51545
Little Sioux (51545)
378 residents
- 51523
Blencoe (51523)
357 residents
What this shows Among its immediate neighbors, ZIP 51545 ranks #3 by population - useful context the national average alone can't give.
ZIP 51545 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 51523
Blencoe (51523)
$82,625 median income
- 51564
Pisgah (51564)
$78,750 median income
- 51557
Mondamin (51557)
$76,250 median income
- 51545
Little Sioux (51545)
$70,313 median income
What this shows By household income, ZIP 51545 ranks #4 of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 51545, both outside IA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Harrison County
Related Areas
Frequently Asked Questions
What county is ZIP code 51545 in?
ZIP code 51545 (Little Sioux) is located in Harrison County, Iowa. Harrison County contains multiple ZIP codes, see the full list at /counties/harrison-ia.
What is the population of ZIP code 51545?
ZIP code 51545 in Little Sioux, IA has a population of 378 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51545?
The median household income in ZIP 51545 is $70,313, which is 8% below the national average of $76,288.
What is the average home value in ZIP 51545?
The median home value in ZIP 51545 is $80,000, which is 71% below the national average of $278,155.
What is the demographic makeup of ZIP 51545?
The largest racial group in ZIP 51545 is White at 94.8%. Hispanic or Latino residents make up 1.5% of the population.
How many businesses are in ZIP code 51545?
ZIP code 51545 has 4 business establishments employing approximately 7 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 51545?
In ZIP code 51545, 54.6% of residents aged 25+ have a high school diploma or higher, and 5.8% 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 51545?
In ZIP code 51545, approximately 85.5% of occupied housing units are owner-occupied and 14.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51545?
The poverty rate in ZIP code 51545 is 16.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 51545's numbers, next.
- See how ZIP 51545 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Little Sioux, IA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.