County ZIP codes · Ohio · FIPS 39101
Marion County, OH ZIP Codes
Marion County, Ohio has 14 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 12 residential and 2 for PO boxes or a single organization. 8 of the residential ones lie mainly in Marion County and 4 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $55,057 in 43302 (Marion) to $84,803 in 43342 (Prospect) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Marion 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 $60,151 and $73,770.
They carry 12 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 12 residential ZIP codes in Marion County
8 ZIP codes lie mainly in Marion County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 43302 | Marion | 53,702 | 275 | $55k | $154k | 95% |
| 43342 | Prospect | 3,836 | 90 | $85k | $176k | 89% |
| 43314 | Caledonia | 2,438 | 45 | $49k | $148k | 80% |
| 43332 | La Rue | 2,173 | 36 | $81k | $147k | 87% |
| 43356 | Waldo | 1,120 | 54 | $93k | $251k | 73% |
| 43341 | New Bloomington | 953 | 43 | $55k | $153k | 100% |
| 43337 | Morral | 625 | 18 | $71k | $141k | 79% |
| 43322 | Green Camp | 437 | 1,476 | $56k | $123k | 100% |
Partly in Marion County
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?
10 ZIP codes of Marion County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Marion | Elsewhere |
|---|---|---|
| 43302 | 95% | Crawford County 5% |
| 44833 | 6% | Morrow County 44%; Crawford County 42%; Richland County 8% |
| 43315 | 10% | Morrow County 90% |
| 43342 | 89% | Union County 7%; Delaware County 5% |
| 43314 | 80% | Crawford County 12%; Morrow County 8% |
| 44849 | 3% | Wyandot County 73%; Crawford County 24% |
| 43332 | 87% | Hardin County 9%; Wyandot County 4% |
| 43356 | 73% | Delaware County 18%; Morrow County 10% |
| 43337 | 79% | Wyandot County 21% |
| 43323 | 4% | Wyandot County 96% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 43301 | Marion |
| 43335 | Martel |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Marion County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Marion County's ZIP codes use 2 prefixes: 433 and 448.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.