Residential delivery area · Iowa
ZIP Code 51545: Little Sioux, IA
ZIP code 51545 uses the postal name Little Sioux, Iowa and lies mostly in Harrison County (72% of its land) with the rest in Monona County (Census 2020 ZIP-county file). About 270 people live there (Census Bureau, ACS 2020-2024). Median household income is $70,313 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Little Sioux (under 1%) and River Sioux (under 1%); 98% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Little Sioux · its only residential ZIP
- County
- Harrison County (72%); Monona County (28%)
- Census places
- Little Sioux (under 1%); River Sioux (under 1%) census-designated place
- Metro area
- Omaha, NE-IA
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 46.5 sq mi · 6 people per sq mi
Where is ZIP code 51545?
51545 centers on 41.851°, -96.015° and covers 46.5 square miles of land plus 0.8 of water. It borders 5 ZIP codes: 51523, 51564, 51557, 51558, 68061.
The map draws ZIP code areas only. For the streets inside 51545, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 51545 compare with the rest of Harrison County?
| Measure | 51545 | In Harrison County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 267 | 13th of 15 | 814th of 970 |
| Median household income | $70k | not ranked | not ranked |
| Median home value | $80k | not ranked | not ranked |
51545's income and home value are not ranked: it has fewer than 1,000 residents (267). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 12% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 51545?
The 2020 Census counted 345 people in 51545; the ACS, which samples households over 2020-2024, estimates 267. Between the 2010 and 2020 censuses its population fell 8.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 267±78 (90% margin)
- 2020 Census count
- 345−8.7% since 2010 (378)
- Households
- 131
- Median age
- 58.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 51545?
Of the 267 people the ACS estimates in 51545, 12.4% are under 18 and 29.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.8%).
- Under 1812.4%
- 18 to 6458.1%
- 65 and older29.6%
- White, not Hispanic94.8%
- Other or two or more3.7%
- Hispanic or Latino1.5%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 51545 earn?
Median household income is $70,313 (ACS 2020-2024). It is not measurably different from 2015-2019 ($44,916 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $70,313±$22,121
- Income per person
- $32,551
- Below the poverty line
- 16.1%
- Unemployed (of the labor force)
- 0.8%
- Adults 25+ with a bachelor's degree
- 5.8%
- Adjusted gross income per tax return, 2022
- $67,982110 returns; wages 58% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 51545?
- Median home value (owners' estimate)
- $80,000
- Median gross rent
- $508
- Homes owned by their occupants
- 85.5%
- Housing units
- 173
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 51545?
4 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018 (ZIP Code Business Patterns).
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 51545?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51523 | Blencoe | 379 | $83k | 5.2 mi |
| 51564 | Pisgah | 520 | $79k | 5.5 mi |
| 51557 | Mondamin | 828 | $76k | 8.1 mi |
| 51558 | Moorhead | 549 | $77k | 8.2 mi |
| 68061 | Tekamah, NE | 2,268 | $65k | 11.0 mi |
| 51040 | Onawa | 3,500 | $71k | 12.8 mi (near) |
| 51550 | Magnolia | 169 | $78k | 13.1 mi (near) |
| 51572 | Soldier | 371 | $70k | 14.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.