First three digits · Ohio
ZIP Codes Starting with
43 ZIP codes start with 433, sorted at the Columbus, OH (SCF 430) sectional center (USPS labeling list L005, effective October 1, 2026) in Ohio: 40 residential ZIP codes across 6 counties and 3 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 433 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 433, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 433 to the Columbus, OH (SCF 430) facility. The last two digits pick the delivery area. By residents, the largest town names among the 433 ZIP codes are Marion, Bellefontaine, Kenton, Mount Gilead, Upper Sandusky and Cardington.
The same facility sorts 9 prefixes, 490 ZIP codes in all: 430, 431, 432, 433, 437, 438, 456, 457, 458.
Where are the 433 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 433
| County | ||||||
|---|---|---|---|---|---|---|
| 43301 | Marion | Marion County | PO Box or unique | – | – | – |
| 43302 | Marion | Marion County | 53,702 | 275 | $55k | $154k |
| 43310 | Belle Center | Hardin County | 3,177 | 48 | $68k | $163k |
| 43311 | Bellefontaine | Logan County | 20,391 | 196 | $68k | $208k |
| 43314 | Caledonia | Marion County | 2,438 | 45 | $49k | $148k |
| 43315 | Cardington | Morrow County | 6,873 | 82 | $74k | $183k |
| 43316 | Carey | Wyandot County | 5,968 | 79 | $79k | $167k |
| 43317 | Chesterville | Morrow County | 173 | 786 | $57k | $171k |
| 43318 | De Graff | Logan County | 4,352 | 68 | $92k | $216k |
| 43319 | East Liberty | Logan County | 851 | 45 | $136k | $303k |
| 43320 | Edison | Morrow County | 1,189 | 38 | $52k | $124k |
| 43321 | Fulton | Morrow County | 378 | 2,471 | $48k | $125k |
| 43322 | Green Camp | Marion County | 437 | 1,476 | $56k | $123k |
| 43323 | Harpster | Wyandot County | 598 | 16 | $57k | $179k |
| 43324 | Huntsville | Logan County | 2,733 | 95 | $57k | $257k |
| 43325 | Iberia | Morrow County | 70 | 83 | – | – |
| 43326 | Kenton | Hardin County | 12,573 | 67 | $64k | $153k |
| 43330 | Kirby | Wyandot County | 100 | 926 | $66k | $105k |
| 43331 | Lakeview | Logan County | 4,106 | 133 | $61k | $145k |
| 43332 | La Rue | Marion County | 2,173 | 36 | $81k | $147k |
| 43333 | Lewistown | Logan County | 941 | 31 | – | $252k |
| 43334 | Marengo | Morrow County | 6,326 | 96 | $101k | $263k |
| 43335 | Martel | Marion County | PO Box or unique | – | – | – |
| 43336 | Middleburg | Logan County | 41 | 79 | – | – |
| 43337 | Morral | Marion County | 625 | 18 | $71k | $141k |
| 43338 | Mount Gilead | Morrow County | 10,599 | 112 | $72k | $242k |
| 43340 | Mount Victory | Hardin County | 2,103 | 43 | $72k | $193k |
| 43341 | New Bloomington | Marion County | 953 | 43 | $55k | $153k |
| 43342 | Prospect | Marion County | 3,836 | 90 | $85k | $176k |
| 43343 | Quincy | Logan County | 1,366 | 38 | $63k | $157k |
| 43344 | Richwood | Union County | 6,173 | 63 | $81k | $238k |
| 43345 | Ridgeway | Logan County | 666 | 23 | $91k | $202k |
| 43346 | Roundhead | Hardin County | 238 | 222 | $57k | – |
| 43347 | Rushsylvania | Logan County | 1,113 | 36 | $94k | $158k |
| 43348 | Russells Point | Logan County | 1,897 | 820 | $51k | $173k |
| 43349 | Shauck | Morrow County | PO Box or unique | – | – | – |
| 43350 | Sparta | Morrow County | 146 | 1,058 | $71k | $158k |
| 43351 | Upper Sandusky | Wyandot County | 10,457 | 68 | $68k | $170k |
| 43356 | Waldo | Marion County | 1,120 | 54 | $93k | $251k |
| 43357 | West Liberty | Logan County | 4,899 | 72 | $92k | $235k |
| 43358 | West Mansfield | Union County | 2,275 | 37 | $89k | $219k |
| 43359 | Wharton | Wyandot County | 748 | 35 | $69k | $165k |
| 43360 | Zanesfield | Logan County | 1,538 | 51 | $106k | $232k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.