First three digits · Ohio
ZIP Codes Starting with
45 ZIP codes start with 434, sorted at the Toledo, OH (SCF 434) sectional center (USPS labeling list L005, effective October 1, 2026) in Ohio: 43 residential ZIP codes across 5 counties and 2 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 434 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 434, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 434 to the Toledo, OH (SCF 434) facility. The last two digits pick the delivery area. By residents, the largest town names among the 434 ZIP codes are Bowling Green, Fremont, Port Clinton, Clyde, Oak Harbor and Rossford.
The same facility sorts 3 prefixes, 133 ZIP codes in all: 434, 435, 436.
Where are the 434 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 434
| County | ||||||
|---|---|---|---|---|---|---|
| 43402 | Bowling Green | Wood County | 31,393 | 284 | $52k | $243k |
| 43403 | Bowling Green | Wood County | 4,452 | 14,269 | – | – |
| 43405 | Toledo | Lucas County | PO Box or unique | – | – | – |
| 43406 | Bradner | Wood County | 1,619 | 86 | $72k | $161k |
| 43407 | Burgoon | Sandusky County | 484 | 33 | $69k | $217k |
| 43408 | Clay Center | Ottawa County | 386 | 587 | $62k | $118k |
| 43410 | Clyde | Sandusky County | 10,220 | 199 | $53k | $165k |
| 43412 | Curtice | Lucas County | 4,175 | 151 | $108k | $229k |
| 43413 | Cygnet | Wood County | 1,160 | 35 | $80k | $140k |
| 43414 | Dunbridge | Wood County | 144 | 326 | – | – |
| 43416 | Elmore | Ottawa County | 2,868 | 102 | $89k | $197k |
| 43420 | Fremont | Sandusky County | 29,520 | 217 | $61k | $153k |
| 43430 | Genoa | Ottawa County | 4,911 | 192 | $74k | $157k |
| 43431 | Gibsonburg | Sandusky County | 4,609 | 92 | $78k | $151k |
| 43432 | Graytown | Ottawa County | 1,357 | 62 | $152k | $245k |
| 43433 | Gypsum | Ottawa County | no residents | 0 | – | – |
| 43434 | Harbor View | Lucas County | 110 | 4,783 | $72k | $105k |
| 43435 | Helena | Sandusky County | 1,368 | 39 | $89k | $176k |
| 43436 | Isle Saint George | Ottawa County | no residents | 0 | – | – |
| 43437 | Jerry City | Wood County | 465 | 492 | $69k | $136k |
| 43438 | Kelleys Island | Erie County | 128 | 29 | $83k | $346k |
| 43439 | Lacarne | Ottawa County | no residents | 0 | – | – |
| 43440 | Lakeside Marblehead | Ottawa County | 4,222 | 266 | $75k | $297k |
| 43441 | Lemoyne | Wood County | PO Box or unique | – | – | – |
| 43442 | Lindsey | Sandusky County | 824 | 47 | $62k | $173k |
| 43443 | Luckey | Wood County | 1,613 | 130 | $98k | $207k |
| 43445 | Martin | Ottawa County | 801 | 39 | $83k | $193k |
| 43446 | Middle Bass | Ottawa County | 35 | 28 | – | – |
| 43447 | Millbury | Wood County | 3,348 | 193 | $90k | $219k |
| 43449 | Oak Harbor | Ottawa County | 7,572 | 90 | $71k | $181k |
| 43450 | Pemberville | Wood County | 3,759 | 92 | $84k | $240k |
| 43451 | Portage | Wood County | 1,148 | 46 | $62k | $207k |
| 43452 | Port Clinton | Ottawa County | 14,264 | 309 | $68k | $222k |
| 43456 | Put In Bay | Ottawa County | 692 | 273 | $73k | $589k |
| 43457 | Risingsun | Wood County | 1,411 | 74 | $55k | $154k |
| 43458 | Rocky Ridge | Ottawa County | 282 | 284 | $79k | $97k |
| 43460 | Rossford | Wood County | 6,200 | 2,386 | $74k | $174k |
| 43462 | Rudolph | Wood County | 1,076 | 42 | $88k | $167k |
| 43463 | Stony Ridge | Wood County | 366 | 1,228 | $70k | $105k |
| 43464 | Vickery | Sandusky County | 2,138 | 65 | $42k | $124k |
| 43465 | Walbridge | Wood County | 5,451 | 444 | $71k | $173k |
| 43466 | Wayne | Wood County | 2,492 | 88 | $87k | $177k |
| 43467 | West Millgrove | Wood County | 185 | 856 | $98k | $94k |
| 43468 | Williston | Ottawa County | 459 | 279 | $131k | $206k |
| 43469 | Woodville | Sandusky County | 2,905 | 127 | $86k | $206k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.