Residential delivery area · Iowa
ZIP Code 51577: Walnut, IA
ZIP code 51577 uses the postal name Walnut, Iowa and lies mostly in Pottawattamie County (67% of its land), reaching into Shelby County and Cass County (Census 2020 ZIP-county file). About 1,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $71,518 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Walnut; 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Walnut · its only residential ZIP
- County
- Pottawattamie County (67%); Shelby County (31%); Cass County (2%)
- Census places
- Walnut
- Metro area
- Omaha, NE-IA
- House districts
- IA-4 (98%), IA-3 (2%) 119th Congress, by share of land
- State
- Iowa
- Time zone
- Central
- Land area
- 83.6 sq mi · 19 people per sq mi
Where is ZIP code 51577?
51577 centers on 41.464°, -95.204° and covers 83.6 square miles of land plus 0.0 of water. It borders 9 ZIP codes: 51552, 51521, 51536, 51531, 50022, 51544, 51537, 51560, 51535.
The map draws ZIP code areas only. For the streets inside 51577, 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 51577 compare with the rest of Pottawattamie County?
| Measure | 51577 | In Pottawattamie County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 1,561 | 13th of 24 | 338th of 970 |
| Median household income | $72k | 13th of 15 | 254th of 396 |
| Median home value | $134k | 15th of 15 | 354th of 423 |
Its median household income is higher than in 49% of U.S. residential ZIP codes, and it is denser than 25% of all 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 51577?
The 2020 Census counted 1,101 people in 51577; the ACS, which samples households over 2020-2024, estimates 1,561. Between the 2010 and 2020 censuses its population fell 7.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,561±199 (90% margin)
- 2020 Census count
- 1,101−7.0% since 2010 (1,184)
- Households
- 406
- Median age
- 64.9
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 51577?
Of the 1,561 people the ACS estimates in 51577, 15.2% are under 18 and 49.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.2%).
- Under 1815.2%
- 18 to 6435.0%
- 65 and older49.8%
- White, not Hispanic96.2%
- Hispanic or Latino2.9%
- Black, not Hispanic0.6%
- Other or two or more0.4%
- 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 51577 earn?
Median household income is $71,518 (ACS 2020-2024), the 13th highest of the 15 ranked ZIP codes in Pottawattamie County. It is not measurably different from 2015-2019 ($60,498 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $71,518±$11,432
- Income per person
- $31,949
- Below the poverty line
- 10.1%
- Unemployed (of the labor force)
- 6.5%
- Adults 25+ with a bachelor's degree
- 16.8%
- Adjusted gross income per tax return, 2022
- $71,650480 returns; wages 57% 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 51577?
- Median home value (owners' estimate)
- $134,100
- Median gross rent
- $874
- Homes owned by their occupants
- 77.3%
- Housing units
- 460
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 51577?
29 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in finance and insurance (ZIP Code Business Patterns).
- Finance and insurance7
- Other services (except public administration)6
- Retail trade5
- Construction3
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 51577?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51552 | Marne | 169 | $90k | 4.9 mi |
| 51521 | Avoca | 1,953 | $74k | 7.4 mi |
| 51536 | Hancock | 613 | $102k | 10.3 mi |
| 51531 | Elk Horn | 889 | $59k | 10.4 mi |
| 50022 | Atlantic | 8,526 | $63k | 10.7 mi |
| 51544 | Lewis | 793 | $48k | 11.6 mi |
| 51537 | Harlan | 6,382 | $65k | 13.8 mi |
| 51560 | Oakland | 1,772 | $76k | 14.6 mi |
| 51535 | Griswold | 1,697 | $76k | 16.9 mi |
| 51570 | Shelby | 1,118 | $78k | 14.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.