First three digits · Kentucky
ZIP Codes Starting with
38 ZIP codes start with 427, sorted at the Louisville, KY (SCF 400) sectional center (USPS labeling list L005, effective October 1, 2026) in Kentucky: 34 residential ZIP codes across 8 counties and 4 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 427 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 427, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 427 to the Louisville, KY (SCF 400) facility. The last two digits pick the delivery area. By residents, the largest town names among the 427 ZIP codes are Elizabethtown, Campbellsville, Leitchfield, Columbia, Hodgenville and Greensburg.
The same facility sorts 5 prefixes, 249 ZIP codes in all: 400, 401, 402, 427, 471.
Where are the 427 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 427
| County | ||||||
|---|---|---|---|---|---|---|
| 42701 | Elizabethtown | Hardin County | 53,987 | 333 | $70k | $260k |
| 42702 | Elizabethtown | Hardin County | PO Box or unique | – | – | – |
| 42712 | Big Clifty | Hardin County | 1,714 | 32 | $46k | $147k |
| 42713 | Bonnieville | Hart County | 1,781 | 38 | $60k | $159k |
| 42715 | Breeding | Adair County | 417 | 17 | – | $227k |
| 42716 | Buffalo | Larue County | 1,659 | 53 | $72k | $189k |
| 42717 | Burkesville | Cumberland County | 5,969 | 20 | $43k | $145k |
| 42718 | Campbellsville | Taylor County | 26,768 | 101 | $57k | $171k |
| 42719 | Campbellsville | Taylor County | PO Box or unique | – | – | – |
| 42720 | Cane Valley | Adair County | PO Box or unique | – | – | – |
| 42721 | Caneyville | Grayson County | 4,353 | 31 | $50k | $131k |
| 42722 | Canmer | Hart County | 596 | 35 | $60k | $65k |
| 42724 | Cecilia | Hardin County | 5,345 | 70 | $74k | $197k |
| 42726 | Clarkson | Grayson County | 4,758 | 46 | $60k | $204k |
| 42728 | Columbia | Adair County | 16,412 | 51 | $52k | $151k |
| 42729 | Cub Run | Hart County | 2,142 | 52 | $55k | $189k |
| 42732 | Eastview | Hardin County | 1,541 | 29 | $73k | $266k |
| 42733 | Elk Horn | Taylor County | 1,610 | 29 | $81k | $184k |
| 42740 | Glendale | Hardin County | 1,873 | 60 | $88k | $239k |
| 42741 | Glens Fork | Adair County | 420 | 33 | $78k | $266k |
| 42742 | Gradyville | Adair County | 72 | 37 | – | – |
| 42743 | Greensburg | Green County | 9,342 | 45 | $50k | $136k |
| 42746 | Hardyville | Hart County | 2,101 | 44 | $50k | $115k |
| 42748 | Hodgenville | Larue County | 9,365 | 73 | $66k | $187k |
| 42749 | Horse Cave | Hart County | 4,423 | 48 | $46k | $142k |
| 42753 | Knifley | Adair County | 657 | 26 | $55k | $115k |
| 42754 | Leitchfield | Grayson County | 16,918 | 90 | $49k | $172k |
| 42755 | Leitchfield | Grayson County | PO Box or unique | – | – | – |
| 42757 | Magnolia | Hart County | 2,547 | 33 | $53k | $136k |
| 42758 | Mannsville | Taylor County | no residents | 0 | – | – |
| 42759 | Marrowbone | Cumberland County | 15 | 103 | – | – |
| 42762 | Millwood | Grayson County | 229 | 24 | – | $113k |
| 42764 | Mount Sherman | Green County | 536 | 29 | $74k | $123k |
| 42765 | Munfordville | Hart County | 7,149 | 62 | $60k | $144k |
| 42776 | Sonora | Hardin County | 2,082 | 32 | $59k | $193k |
| 42782 | Summersville | Green County | 702 | 21 | $39k | $90k |
| 42784 | Upton | Hart County | 3,089 | 47 | $69k | $178k |
| 42788 | White Mills | Hardin County | 192 | 25 | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.