County ZIP codes · Iowa · FIPS 19155
Pottawattamie County, IA ZIP Codes
Pottawattamie County, Iowa has 26 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 24 residential and 2 for PO boxes or a single organization. 16 of the residential ones lie mainly in Pottawattamie County and 8 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $56,637 in 51566 (Red Oak) to $112,115 in 51575 (Treynor) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Pottawattamie County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $73,769 and $85,273.
They carry 23 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 24 residential ZIP codes in Pottawattamie County
16 ZIP codes lie mainly in Pottawattamie County; 8 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 51503 | Council Bluffs | 37,972 | 312 | $79k | $262k | 85% |
| 51501 | Council Bluffs | 34,618 | 1,446 | $60k | $152k | 100% |
| 51510 | Carter Lake | 3,767 | 2,100 | $85k | $169k | 100% |
| 51521 | Avoca | 1,953 | 22 | $74k | $203k | 69% |
| 51559 | Neola | 1,841 | 21 | $75k | $202k | 84% |
| 51560 | Oakland | 1,772 | 19 | $76k | $177k | 100% |
| 51576 | Underwood | 1,769 | 38 | $111k | $305k | 100% |
| 51526 | Crescent | 1,664 | 38 | $95k | $334k | 100% |
| 51575 | Treynor | 1,609 | 34 | $112k | $305k | 100% |
| 51577 | Walnut | 1,561 | 19 | $72k | $134k | 67% |
| 51525 | Carson | 1,067 | 17 | $82k | $197k | 100% |
| 51553 | Minden | 998 | 22 | $97k | $226k | 100% |
| 51542 | Honey Creek | 802 | 21 | $118k | $382k | 100% |
| 51536 | Hancock | 613 | 12 | $102k | $163k | 100% |
| 51548 | McClelland | 415 | 16 | $115k | $275k | 100% |
| 51549 | Macedonia | 363 | 12 | $73k | $162k | 100% |
Partly in Pottawattamie County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 51535 | Griswold | 1,697 | 13 | $76k | $152k | 44% |
| 51571 | Silver City | 902 | 20 | $95k | $221k | 34% |
| 51570 | Shelby | 1,118 | 18 | $78k | $205k | 33% |
| 51544 | Lewis | 793 | 16 | $48k | $81k | 26% |
| 51555 | Missouri Valley | 4,952 | 34 | $85k | $189k | 18% |
| 51541 | Henderson | 273 | 6 | $92k | $164k | 13% |
| 51532 | Elliott | 644 | 11 | $65k | $99k | 11% |
| 51566 | Red Oak | 7,010 | 40 | $57k | $134k | 2% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
12 ZIP codes of Pottawattamie County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Pottawattamie | Elsewhere |
|---|---|---|
| 51503 | 85% | Mills County 15% |
| 51566 | 2% | Montgomery County 91%; Page County 7% |
| 51555 | 18% | Harrison County 82% |
| 51521 | 69% | Shelby County 31% |
| 51559 | 84% | Harrison County 16% |
| 51535 | 44% | Cass County 56% |
| 51577 | 67% | Shelby County 31%; Cass County 2% |
| 51570 | 33% | Shelby County 53%; Harrison County 14% |
| 51571 | 34% | Mills County 66% |
| 51544 | 26% | Cass County 74% |
| 51532 | 11% | Montgomery County 86%; Cass County 3% |
| 51541 | 13% | Mills County 71%; Montgomery County 16% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Pottawattamie County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Pottawattamie County starts with 515.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 515 | Omaha, NE (SCF 680) | 26 | 57 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.