County ZIP codes · Ohio · FIPS 39113
Montgomery County, OH ZIP Codes
Montgomery County, Ohio has 53 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 39 residential and 14 for PO boxes or a single organization. 32 of the residential ones lie mainly in Montgomery County and 7 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $36,945 in 45417 (Dayton) to $131,250 in 45066 (Springboro) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Montgomery 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 $51,908 and $83,175.
They carry 14 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 39 residential ZIP codes in Montgomery County
32 ZIP codes lie mainly in Montgomery County; 7 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 45424 | Dayton | 50,725 | 1,609 | $81k | $184k | 85% |
| 45458 | Dayton | 38,712 | 1,948 | $110k | $363k | 82% |
| 45342 | Miamisburg | 36,152 | 1,054 | $85k | $230k | 98% |
| 45459 | Dayton | 28,553 | 2,011 | $90k | $302k | 97% |
| 45417 | Dayton | 28,186 | 875 | $37k | $75k | 100% |
| 45429 | Dayton | 26,347 | 2,662 | $80k | $239k | 100% |
| 45420 | Dayton | 24,411 | 3,788 | $61k | $131k | 100% |
| 45414 | Dayton | 21,167 | 973 | $55k | $182k | 100% |
| 45322 | Englewood | 20,884 | 987 | $75k | $180k | 77% |
| 45406 | Dayton | 19,991 | 4,013 | $42k | $85k | 100% |
| 45449 | Dayton | 19,066 | 2,805 | $64k | $164k | 100% |
| 45405 | Dayton | 18,955 | 4,777 | $44k | $84k | 100% |
| 45419 | Dayton | 17,008 | 4,565 | $92k | $248k | 100% |
| 45409 | Dayton | 15,293 | 4,159 | $87k | $249k | 100% |
| 45377 | Vandalia | 14,888 | 701 | $77k | $203k | 100% |
| 45410 | Dayton | 14,694 | 6,105 | $47k | $111k | 100% |
| 45426 | Dayton | 14,114 | 709 | $52k | $124k | 100% |
| 45403 | Dayton | 13,608 | 4,324 | $38k | $88k | 100% |
| 45415 | Dayton | 12,465 | 2,075 | $81k | $189k | 100% |
| 45439 | Dayton | 11,914 | 1,532 | $52k | $143k | 100% |
| 45309 | Brookville | 11,876 | 180 | $75k | $215k | 95% |
| 45404 | Dayton | 9,826 | 1,300 | $39k | $87k | 100% |
| 45402 | Dayton | 9,407 | 2,155 | $48k | $136k | 100% |
| 45327 | Germantown | 9,315 | 194 | $95k | $219k | 94% |
| 45345 | New Lebanon | 6,110 | 273 | $80k | $153k | 100% |
| 45416 | Dayton | 5,640 | 2,912 | $46k | $81k | 100% |
| 45315 | Clayton | 4,905 | 451 | $92k | $213k | 100% |
| 45325 | Farmersville | 2,470 | 96 | $81k | $235k | 100% |
| 45354 | Phillipsburg | 553 | 615 | $67k | $151k | 100% |
| 45428 | Dayton | 272 | 598 | – | – | 100% |
| 45469 | Dayton | 168 | 9,333 | – | – | 100% |
| 45423 | Dayton | no residents | 0 | – | – | 100% |
Partly in Montgomery County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 45431 | Dayton | 27,951 | 2,382 | $83k | $210k | 38% |
| 45440 | Dayton | 22,358 | 2,431 | $82k | $268k | 36% |
| 45432 | Dayton | 15,055 | 2,111 | $83k | $183k | 34% |
| 45378 | Verona | 539 | 1,761 | $73k | $123k | 20% |
| 45381 | West Alexandria | 5,626 | 104 | $62k | $205k | 9% |
| 45371 | Tipp City | 22,865 | 446 | $94k | $302k | 4% |
| 45066 | Springboro | 27,545 | 1,350 | $131k | $394k | 1% |
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 Montgomery County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Montgomery | Elsewhere |
|---|---|---|
| 45424 | 85% | Greene County 11%; Miami County 4% |
| 45458 | 82% | Warren County 16%; Greene County 2% |
| 45342 | 98% | Warren County 2% |
| 45459 | 97% | Greene County 3% |
| 45431 | 38% | Greene County 62% |
| 45066 | 1% | Warren County 99% |
| 45371 | 4% | Miami County 96% |
| 45440 | 36% | Greene County 64% |
| 45322 | 77% | Miami County 23% |
| 45432 | 34% | Greene County 66% |
| 45309 | 95% | Darke County 2%; Miami County 2% |
| 45327 | 94% | Preble County 4%; Butler County 2% |
| 45381 | 9% | Preble County 91% |
| 45378 | 20% | Preble County 80% |
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 Montgomery County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Montgomery County's ZIP codes use 3 prefixes: 450, 453 and 454.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 450 | Cincinnati, OH (SCF 450) | 1 | 39 |
| 453 | Dayton, OH (SCF 453) | 13 | 80 |
| 454 | Dayton, OH (SCF 453) | 39 | 43 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.