County ZIP codes · Iowa · FIPS 19113
Linn County, IA ZIP Codes
Linn County, Iowa has 37 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 29 residential and 8 for PO boxes or a single organization. 22 of the residential ones lie mainly in Linn County and 7 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $61,870 in 52404 to $170,491 in 52411 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Linn 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 $74,703 and $109,244.
They carry 24 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 29 residential ZIP codes in Linn County
22 ZIP codes lie mainly in Linn County; 7 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52404 | Cedar Rapids | 42,958 | 758 | $62k | $169k | 95% |
| 52402 | Cedar Rapids | 42,938 | 3,137 | $73k | $194k | 100% |
| 52302 | Marion | 42,706 | 574 | $88k | $244k | 100% |
| 52405 | Cedar Rapids | 26,526 | 1,771 | $70k | $186k | 100% |
| 52403 | Cedar Rapids | 22,551 | 860 | $75k | $207k | 100% |
| 52411 | Cedar Rapids | 8,342 | 509 | $171k | $423k | 100% |
| 52233 | Hiawatha | 7,000 | 1,788 | $66k | $204k | 100% |
| 52314 | Mount Vernon | 6,200 | 105 | $109k | $265k | 100% |
| 52213 | Center Point | 4,114 | 56 | $99k | $260k | 76% |
| 52228 | Fairfax | 3,802 | 102 | $118k | $309k | 76% |
| 52227 | Ely | 2,996 | 102 | $120k | $342k | 93% |
| 52214 | Central City | 2,761 | 31 | $87k | $235k | 100% |
| 52328 | Robins | 2,712 | 1,004 | $125k | $383k | 100% |
| 52336 | Springville | 2,397 | 50 | $92k | $225k | 100% |
| 52324 | Palo | 2,216 | 53 | $116k | $327k | 82% |
| 52401 | Cedar Rapids | 2,181 | 1,833 | $35k | $157k | 100% |
| 52352 | Walker | 1,833 | 23 | $92k | $231k | 47% |
| 52218 | Coggon | 1,413 | 19 | $82k | $181k | 56% |
| 52341 | Toddville | 1,378 | 102 | $91k | $372k | 100% |
| 52202 | Alburnett | 1,269 | 49 | $105k | $246k | 100% |
| 52219 | Prairieburg | 143 | 319 | $45k | $98k | 100% |
| 52344 | Troy Mills | 67 | 7,444 | – | – | 100% |
Partly in Linn County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 52351 | Walford | 1,329 | 720 | $129k | $303k | 32% |
| 52253 | Lisbon | 2,622 | 56 | $105k | $238k | 24% |
| 52305 | Martelle | 913 | 34 | $95k | $165k | 22% |
| 52205 | Anamosa | 8,627 | 70 | $73k | $222k | 15% |
| 52332 | Shellsburg | 1,612 | 41 | $93k | $198k | 8% |
| 52338 | Swisher | 3,934 | 118 | $120k | $393k | 6% |
| 52310 | Monticello | 6,450 | 44 | $86k | $196k | 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?
14 ZIP codes of Linn County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Linn | Elsewhere |
|---|---|---|
| 52404 | 95% | Johnson County 5% |
| 52205 | 15% | Jones County 85% |
| 52310 | 4% | Jones County 95% |
| 52213 | 76% | Benton County 24% |
| 52338 | 6% | Johnson County 94% |
| 52228 | 76% | Benton County 13%; Johnson County 11% |
| 52227 | 93% | Johnson County 7% |
| 52253 | 24% | Cedar County 50%; Jones County 18%; Johnson County 9% |
| 52324 | 82% | Benton County 18% |
| 52352 | 47% | Buchanan County 36%; Benton County 17% |
| 52332 | 8% | Benton County 92% |
| 52218 | 56% | Buchanan County 24%; Delaware County 20% |
| 52351 | 32% | Benton County 68% |
| 52305 | 22% | Jones County 78% |
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 Linn County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Linn County's ZIP codes use 3 prefixes: 522, 523 and 524.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 522 | Cedar Rapids, IA (SCF 522) | 10 | 50 |
| 523 | Cedar Rapids, IA (SCF 522) | 13 | 53 |
| 524 | Cedar Rapids, IA (SCF 522) | 14 | 14 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.