County ZIP codes · Iowa · FIPS 19011
Benton County, IA ZIP Codes
Benton County, Iowa has 24 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 16 of the residential ones lie mainly in Benton County and 8 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $70,150 in 52301 (Marengo) to $128,750 in 52351 (Walford) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Benton 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 $77,656 and $115,179.
They carry 24 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 24 residential ZIP codes in Benton County
16 ZIP codes lie mainly in Benton County; 8 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52349 | Vinton | 7,737 | 52 | $71k | $181k | 100% |
| 52208 | Belle Plaine | 2,877 | 47 | $74k | $121k | 56% |
| 52206 | Atkins | 2,564 | 90 | $116k | $310k | 100% |
| 52224 | Dysart | 2,141 | 22 | $70k | $177k | 52% |
| 52332 | Shellsburg | 1,612 | 41 | $93k | $198k | 92% |
| 52345 | Urbana | 1,609 | 506 | $115k | $227k | 100% |
| 52315 | Newhall | 1,339 | 47 | $78k | $196k | 100% |
| 52351 | Walford | 1,329 | 720 | $129k | $303k | 68% |
| 52209 | Blairstown | 1,158 | 29 | $86k | $223k | 96% |
| 52346 | Van Horne | 1,113 | 23 | $113k | $247k | 100% |
| 52318 | Norway | 1,099 | 31 | $86k | $188k | 82% |
| 52249 | Keystone | 1,060 | 21 | $75k | $163k | 100% |
| 52229 | Garrison | 678 | 13 | $87k | $151k | 100% |
| 52313 | Mount Auburn | 480 | 16 | $91k | $208k | 100% |
| 52354 | Watkins | 420 | 14 | $113k | $166k | 100% |
| 52257 | Luzerne | 216 | 13 | $95k | – | 100% |
Partly in Benton County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52225 | Elberon | 387 | 10 | $62k | $148k | 28% |
| 50651 | La Porte City | 3,147 | 27 | $88k | $188k | 26% |
| 52213 | Center Point | 4,114 | 56 | $99k | $260k | 24% |
| 52324 | Palo | 2,216 | 53 | $116k | $327k | 18% |
| 52352 | Walker | 1,833 | 23 | $92k | $231k | 17% |
| 52228 | Fairfax | 3,802 | 102 | $118k | $309k | 13% |
| 52301 | Marengo | 4,028 | 32 | $70k | $160k | 4% |
| 52210 | Brandon | 958 | 28 | $71k | $158k | 1% |
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?
14 ZIP codes of Benton County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Benton | Elsewhere |
|---|---|---|
| 52213 | 24% | Linn County76% |
| 52301 | 4% | Iowa County96% |
| 52228 | 13% | Linn County76%; Johnson County11% |
| 50651 | 26% | Black Hawk County71%; Tama County3% |
| 52208 | 56% | Iowa County27%; Tama County13%; Poweshiek County3% |
| 52324 | 18% | Linn County82% |
| 52224 | 52% | Tama County48% |
| 52352 | 17% | Linn County47%; Buchanan County36% |
| 52332 | 92% | Linn County8% |
| 52351 | 68% | Linn County32% |
| 52209 | 96% | Iowa County4% |
| 52318 | 82% | Iowa County18% |
| 52210 | 1% | Buchanan County99% |
| 52225 | 28% | Tama County72% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Benton County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Benton County's ZIP codes use 3 prefixes: 506, 522 and 523.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 506 | Waterloo, IA (SCF 506) | 1 | 70 |
| 522 | Cedar Rapids, IA (SCF 522) | 11 | 50 |
| 523 | Cedar Rapids, IA (SCF 522) | 12 | 53 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.