County ZIP codes · Kentucky · FIPS 21029
Bullitt County, KY ZIP Codes
Bullitt County, Kentucky has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 2 for PO boxes or a single organization. 6 of the residential ones lie mainly in Bullitt County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $65,500 in 40150 (Lebanon Junction) to $100,226 in 40013 (Coxs Creek) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Bullitt 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 $69,940 and $98,528.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Bullitt County
6 ZIP codes lie mainly in Bullitt County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 40165 | Shepherdsville | 38,403 | 339 | $80k | $250k | 100% |
| 40047 | Mount Washington | 23,662 | 792 | $99k | $279k | 95% |
| 40150 | Lebanon Junction | 4,950 | 81 | $66k | $178k | 96% |
| 40109 | Brooks | 2,376 | 178 | $76k | $262k | 97% |
| 40177 | West Point | 1,523 | 98 | $51k | $122k | 49% |
| 40110 | Clermont | 440 | 88 | $47k | $172k | 100% |
Partly in Bullitt County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 40229 | Louisville | 41,299 | 2,359 | $80k | $215k | 30% |
| 40013 | Coxs Creek | 6,670 | 88 | $100k | $265k | 10% |
| 40071 | Taylorsville | 17,239 | 142 | $99k | $329k | 5% |
| 40272 | Louisville | 38,289 | 1,150 | $70k | $176k | 4% |
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?
8 ZIP codes of Bullitt County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Bullitt | Elsewhere |
|---|---|---|
| 40229 | 30% | Jefferson County 70% |
| 40272 | 4% | Jefferson County 96% |
| 40047 | 95% | Spencer County 4% |
| 40071 | 5% | Spencer County 94%; Shelby County 1% |
| 40013 | 10% | Nelson County 77%; Spencer County 14% |
| 40150 | 96% | Hardin County 4% |
| 40109 | 97% | Jefferson County 3% |
| 40177 | 49% | Hardin County 44%; Jefferson County 7% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 40129 | Hillview |
| 40166 | Shepherdsville |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Bullitt County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Bullitt County's ZIP codes use 3 prefixes: 400, 401 and 402.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 400 | Louisville, KY (SCF 400) | 3 | 54 |
| 401 | Louisville, KY (SCF 400) | 7 | 36 |
| 402 | Louisville, KY (SCF 400) | 2 | 66 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.