County ZIP codes · Ohio · FIPS 39141
Ross County, OH ZIP Codes
Ross County, Ohio has 16 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 15 residential and 1 for PO boxes or a single organization. 9 of the residential ones lie mainly in Ross County and 6 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $49,510 in 45681 (South Salem) to $72,823 in 43135 (Laurelville) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Ross 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 $54,333 and $68,000.
They carry 15 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 15 residential ZIP codes in Ross County
9 ZIP codes lie mainly in Ross County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 45601 | Chillicothe | 55,836 | 160 | $60k | $173k | 94% |
| 45628 | Frankfort | 5,999 | 79 | $73k | $183k | 100% |
| 45612 | Bainbridge | 4,933 | 44 | $54k | $147k | 62% |
| 45644 | Kingston | 4,619 | 76 | $74k | $238k | 68% |
| 43115 | Clarksburg | 1,796 | 40 | $94k | $157k | 83% |
| 45681 | South Salem | 1,451 | 40 | $50k | $143k | 100% |
| 45673 | Richmond Dale | 473 | 965 | $64k | $87k | 100% |
| 43101 | Adelphi | 316 | 1,153 | $39k | $164k | 100% |
| 45617 | Bourneville | no residents | 0 | – | – | 100% |
Partly in Ross County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 45647 | Londonderry | 1,869 | 28 | $70k | $216k | 36% |
| 45123 | Greenfield | 8,740 | 82 | $62k | $162k | 33% |
| 45690 | Waverly | 13,988 | 99 | $54k | $166k | 12% |
| 43164 | Williamsport | 2,176 | 35 | $68k | $190k | 9% |
| 43135 | Laurelville | 3,937 | 43 | $73k | $223k | 8% |
| 43160 | Washington Court House | 22,105 | 104 | $62k | $170k | 6% |
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 Ross County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Ross | Elsewhere |
|---|---|---|
| 45601 | 94% | Pike County 3%; Jackson County 3% |
| 43160 | 6% | Fayette County 94% |
| 45690 | 12% | Pike County 88% |
| 45123 | 33% | Highland County 43%; Fayette County 24% |
| 45612 | 62% | Pike County 27%; Highland County 11% |
| 45644 | 68% | Pickaway County 32% |
| 43135 | 8% | Hocking County 79%; Pickaway County 12% |
| 43164 | 9% | Pickaway County 91% |
| 45647 | 36% | Vinton County 64% |
| 43115 | 83% | Pickaway County 17% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 45633 | Hallsville |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Ross County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Ross County's ZIP codes use 3 prefixes: 431, 451 and 456.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 431 | Columbus, OH (SCF 430) | 5 | 49 |
| 451 | Cincinnati, OH (SCF 450) | 1 | 49 |
| 456 | Columbus, OH (SCF 430) | 10 | 69 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.