First three digits · Ohio
ZIP Codes Starting with
39 ZIP codes start with 450, sorted at the Cincinnati, OH (SCF 450) sectional center (USPS labeling list L005, effective October 1, 2026) in Ohio: 33 residential ZIP codes across 4 counties and 6 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 450 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 450, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 450 to the Cincinnati, OH (SCF 450) facility. The last two digits pick the delivery area. By residents, the largest town names among the 450 ZIP codes are Hamilton, Middletown, Mason, West Chester, Fairfield and Lebanon.
The same facility sorts 6 prefixes, 258 ZIP codes in all: 410, 450, 451, 452, 459, 470.
Where are the 450 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 450
| County | ||||||
|---|---|---|---|---|---|---|
| 45001 | Addyston | Hamilton County | 904 | 1,062 | $50k | $106k |
| 45002 | Cleves | Hamilton County | 15,413 | 601 | $81k | $311k |
| 45003 | College Corner | Preble County | 839 | 55 | $71k | $169k |
| 45004 | Collinsville | Butler County | PO Box or unique | – | – | – |
| 45005 | Franklin | Warren County | 32,251 | 880 | $75k | $219k |
| 45011 | Hamilton | Butler County | 75,864 | 1,256 | $92k | $294k |
| 45012 | Hamilton | Butler County | PO Box or unique | – | – | – |
| 45013 | Hamilton | Butler County | 53,998 | 459 | $74k | $232k |
| 45014 | Fairfield | Butler County | 45,773 | 2,026 | $76k | $232k |
| 45015 | Hamilton | Butler County | 11,038 | 1,960 | $48k | $121k |
| 45018 | Fairfield | Butler County | PO Box or unique | – | – | – |
| 45030 | Harrison | Hamilton County | 21,640 | 539 | $99k | $241k |
| 45032 | Harveysburg | Warren County | 683 | 1,882 | $67k | $164k |
| 45033 | Hooven | Hamilton County | 377 | 1,193 | $43k | $83k |
| 45034 | Kings Mills | Warren County | 968 | 1,299 | $152k | $324k |
| 45036 | Lebanon | Warren County | 42,204 | 520 | $99k | $352k |
| 45039 | Maineville | Warren County | 28,335 | 1,820 | $109k | $327k |
| 45040 | Mason | Warren County | 59,518 | 2,092 | $133k | $440k |
| 45041 | Miamitown | Hamilton County | 118 | 656 | – | – |
| 45042 | Middletown | Butler County | 27,652 | 562 | $70k | $202k |
| 45044 | Middletown | Butler County | 56,217 | 1,488 | $74k | $242k |
| 45050 | Monroe | Butler County | 12,248 | 1,453 | $104k | $293k |
| 45051 | Mount Saint Joseph | Hamilton County | 334 | 736 | $67k | – |
| 45052 | North Bend | Hamilton County | 4,236 | 319 | $101k | $305k |
| 45053 | Okeana | Butler County | 3,718 | 137 | $109k | $342k |
| 45054 | Oregonia | Warren County | 2,693 | 87 | $100k | $296k |
| 45055 | Overpeck | Butler County | 198 | 865 | – | – |
| 45056 | Oxford | Butler County | 27,376 | 366 | $49k | $251k |
| 45061 | Ross | Butler County | PO Box or unique | – | – | – |
| 45062 | Seven Mile | Butler County | 511 | 646 | $53k | $142k |
| 45063 | Shandon | Butler County | PO Box or unique | – | – | – |
| 45064 | Somerville | Butler County | 3,373 | 105 | $103k | $240k |
| 45065 | South Lebanon | Warren County | 7,053 | 2,400 | $105k | $312k |
| 45066 | Springboro | Warren County | 27,545 | 1,350 | $131k | $394k |
| 45067 | Trenton | Butler County | 15,471 | 790 | $82k | $237k |
| 45068 | Waynesville | Warren County | 11,597 | 164 | $96k | $336k |
| 45069 | West Chester | Butler County | 56,037 | 1,935 | $115k | $345k |
| 45070 | West Elkton | Preble County | 142 | 352 | $50k | $88k |
| 45071 | West Chester | Butler County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.