County ZIP codes · Iowa · FIPS 19095
Iowa County, IA ZIP Codes
Iowa County, Iowa has 21 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 20 residential and 1 for PO boxes or a single organization. 12 of the residential ones lie mainly in Iowa County and 8 mainly in a neighboring county; 13 cross the county line. Median household income ranges from $60,768 in 52316 (North English) to $101,950 in 52203 (Amana) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Iowa 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 $60,992 and $78,482.
They carry 20 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 20 residential ZIP codes in Iowa County
12 ZIP codes lie mainly in Iowa County; 8 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52361 | Williamsburg | 4,582 | 35 | $61k | $211k | 100% |
| 52301 | Marengo | 4,028 | 32 | $70k | $160k | 96% |
| 52203 | Amana | 2,231 | 42 | $102k | $297k | 79% |
| 52316 | North English | 1,597 | 22 | $61k | $151k | 87% |
| 52347 | Victor | 1,386 | 22 | $79k | $145k | 67% |
| 52236 | Homestead | 564 | 22 | $88k | $192k | 100% |
| 52251 | Ladora | 544 | 14 | $88k | $120k | 100% |
| 52325 | Parnell | 477 | 12 | $76k | – | 86% |
| 52220 | Conroy | 199 | 261 | – | $213k | 100% |
| 52334 | South Amana | 181 | 13 | – | $173k | 100% |
| 52308 | Millersburg | 129 | 1,057 | $80k | $107k | 100% |
| 52307 | Middle Amana | 63 | 118 | $43k | – | 100% |
Partly in Iowa County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52222 | Deep River | 631 | 8 | $82k | $121k | 29% |
| 52208 | Belle Plaine | 2,877 | 47 | $74k | $121k | 27% |
| 52318 | Norway | 1,099 | 31 | $86k | $188k | 18% |
| 52356 | Wellman | 2,664 | 28 | $57k | $228k | 17% |
| 52221 | Guernsey | 332 | 16 | $87k | $228k | 15% |
| 52355 | Webster | 283 | 8 | $64k | $110k | 8% |
| 50136 | Keswick | 376 | 9 | $76k | $98k | 6% |
| 52209 | Blairstown | 1,158 | 29 | $86k | $223k | 4% |
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?
13 ZIP codes of Iowa County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Iowa | Elsewhere |
|---|---|---|
| 52301 | 96% | Benton County 4% |
| 52208 | 27% | Benton County 56%; Tama County 13%; Poweshiek County 3% |
| 52356 | 17% | Washington County 74%; Johnson County 8%; Keokuk County 1% |
| 52203 | 79% | Johnson County 21% |
| 52316 | 87% | Keokuk County 13% |
| 52347 | 67% | Poweshiek County 33% |
| 52209 | 4% | Benton County 96% |
| 52318 | 18% | Benton County 82% |
| 52222 | 29% | Poweshiek County 71% |
| 52325 | 86% | Johnson County 14% |
| 50136 | 6% | Keokuk County 94% |
| 52221 | 15% | Poweshiek County 85% |
| 52355 | 8% | Keokuk County 92% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 52204 | Amana |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Iowa County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Iowa County's ZIP codes use 3 prefixes: 501, 522 and 523.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 501 | Des Moines, IA (SCF 500) | 1 | 69 |
| 522 | Cedar Rapids, IA (SCF 522) | 9 | 50 |
| 523 | Cedar Rapids, IA (SCF 522) | 11 | 53 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.