Residential delivery area · Iowa
ZIP Code 51576: Underwood, IA
ZIP code 51576 uses the postal name Underwood, Iowa and lies entirely in Pottawattamie County (Census 2020 ZIP-county file). About 1,800 people live there (Census Bureau, ACS 2020-2024). Median household income is $110,476 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Underwood (2%) and Weston (under 1%), and under 1% in smaller places; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Underwood · its only residential ZIP
- County
- Pottawattamie County
- Census places
- Underwood (2%); Weston (under 1%) census-designated place
- Metro area
- Omaha, NE-IA
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 46.3 sq mi · 38 people per sq mi
Where is ZIP code 51576?
51576 centers on 41.383°, -95.715° and covers 46.3 square miles of land plus 0.2 of water. It borders 5 ZIP codes: 51548, 51559, 51542, 51526, 51503.
The map draws ZIP code areas only. For the streets inside 51576, 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 51576 compare with the rest of Pottawattamie County?
| Measure | 51576 | In Pottawattamie County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 1,769 | 9th of 24 | 306th of 970 |
| Median household income | $111k | 2nd of 15 | 30th of 396 |
| Median home value | $305k | 2nd of 15 | 46th of 423 |
Its median household income is higher than in 87% of U.S. residential ZIP codes, and it is denser than 37% 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 51576?
The 2020 Census counted 2,058 people in 51576; the ACS, which samples households over 2020-2024, estimates 1,769. Between the 2010 and 2020 censuses its population fell 2.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,769±324 (90% margin)
- 2020 Census count
- 2,058−2.5% since 2010 (2,110)
- Households
- 650
- Median age
- 40.1
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 51576?
Of the 1,769 people the ACS estimates in 51576, 25.2% are under 18 and 15.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.1%).
- Under 1825.2%
- 18 to 6459.9%
- 65 and older15.0%
- White, not Hispanic95.1%
- Other or two or more2.1%
- Hispanic or Latino2.1%
- Asian, not Hispanic0.7%
- Black, 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 51576 earn?
Median household income is $110,476 (ACS 2020-2024), the 2nd highest of the 15 ranked ZIP codes in Pottawattamie County. It is not measurably different from 2015-2019 ($111,248 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $110,476±$18,252
- Income per person
- $47,631
- Below the poverty line
- 1.7%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 31.1%
- Adjusted gross income per tax return, 2022
- $100,1151,020 returns; wages 71% 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 51576?
- Median home value (owners' estimate)
- $305,400
- Median gross rent
- $1,172
- Homes owned by their occupants
- 89.2%
- Housing units
- 706
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 51576?
39 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction7
- Transportation and warehousing6
- Accommodation and food services6
- Retail trade5
- Professional, scientific, and technical services4
- Wholesale trade3
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 51576?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51548 | McClelland | 415 | $115k | 6.1 mi |
| 51559 | Neola | 1,841 | $75k | 6.2 mi |
| 51542 | Honey Creek | 802 | $118k | 7.2 mi |
| 51526 | Crescent | 1,664 | $95k | 8.2 mi |
| 51503 | Council Bluffs | 37,972 | $79k | 11.6 mi |
| 51553 | Minden | 998 | $97k | 9.0 mi (near) |
| 68110 | Omaha, NE | 9,229 | $40k | 10.8 mi (near) |
| 51575 | Treynor | 1,609 | $112k | 11.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.