First three digits · Kentucky
ZIP Codes Starting with
52 ZIP codes start with 420, sorted at the Evansville, IN (SCF 476) sectional center (USPS labeling list L005, effective October 1, 2026) in Kentucky: 48 residential ZIP codes across 11 counties and 4 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 420 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 420, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 420 to the Evansville, IN (SCF 476) facility. The last two digits pick the delivery area. By residents, the largest town names among the 420 ZIP codes are Paducah, Murray, Mayfield, Benton, Marion and Eddyville.
The same facility sorts 6 prefixes, 248 ZIP codes in all: 420, 423, 424, 475, 476, 477.
Where are the 420 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 420
| County | ||||||
|---|---|---|---|---|---|---|
| 42001 | Paducah | McCracken County | 30,856 | 416 | $71k | $215k |
| 42002 | Paducah | McCracken County | PO Box or unique | – | – | – |
| 42003 | Paducah | McCracken County | 29,672 | 430 | $56k | $167k |
| 42020 | Almo | Calloway County | 2,476 | 102 | $65k | $181k |
| 42021 | Arlington | Carlisle County | 1,090 | 19 | $57k | $95k |
| 42022 | Bandana | Ballard County | 198 | 402 | $92k | $88k |
| 42023 | Bardwell | Carlisle County | 2,529 | 27 | $63k | $118k |
| 42024 | Barlow | Ballard County | 1,205 | 26 | $47k | $130k |
| 42025 | Benton | Marshall County | 19,941 | 100 | $70k | $172k |
| 42027 | Boaz | Graves County | 1,875 | 41 | $58k | $194k |
| 42028 | Burna | Livingston County | 403 | 16 | $51k | $82k |
| 42029 | Calvert City | Marshall County | 5,552 | 121 | $64k | $154k |
| 42031 | Clinton | Hickman County | 3,411 | 23 | $57k | $119k |
| 42032 | Columbus | Hickman County | 223 | 32 | $35k | $59k |
| 42033 | Crayne | Crittenden County | PO Box or unique | – | – | – |
| 42035 | Cunningham | Carlisle County | 816 | 31 | $56k | – |
| 42036 | Dexter | Calloway County | 1,194 | 43 | $98k | $120k |
| 42037 | Dycusburg | Crittenden County | 16 | 286 | – | – |
| 42038 | Eddyville | Lyon County | 6,282 | 72 | $65k | $198k |
| 42039 | Fancy Farm | Graves County | 1,694 | 35 | $71k | $143k |
| 42040 | Farmington | Graves County | 692 | 22 | $51k | $124k |
| 42041 | Fulton | Fulton County | 4,406 | 41 | $36k | $106k |
| 42044 | Gilbertsville | Marshall County | 3,894 | 165 | $57k | $271k |
| 42045 | Grand Rivers | Livingston County | 1,931 | 47 | $51k | $158k |
| 42047 | Hampton | Livingston County | 321 | 15 | <$2,500 | $360k |
| 42048 | Hardin | Marshall County | 2,083 | 78 | $56k | $139k |
| 42049 | Hazel | Calloway County | 1,311 | 29 | $53k | $190k |
| 42050 | Hickman | Fulton County | 3,015 | 27 | $42k | $77k |
| 42051 | Hickory | Graves County | 2,114 | 40 | $76k | $163k |
| 42053 | Kevil | Ballard County | 5,307 | 44 | $81k | $174k |
| 42054 | Kirksey | Calloway County | 837 | 25 | $59k | $160k |
| 42055 | Kuttawa | Lyon County | 2,201 | 49 | $64k | $179k |
| 42056 | La Center | Ballard County | 1,450 | 27 | $57k | $131k |
| 42058 | Ledbetter | Livingston County | 2,224 | 140 | $67k | $119k |
| 42060 | Lovelaceville | Ballard County | 28 | 34 | – | – |
| 42061 | Lowes | Graves County | 59 | 169 | – | – |
| 42063 | Lynnville | Graves County | PO Box or unique | – | – | – |
| 42064 | Marion | Crittenden County | 8,098 | 28 | $47k | $126k |
| 42066 | Mayfield | Graves County | 23,917 | 110 | $49k | $146k |
| 42069 | Melber | Graves County | 1,214 | 50 | $49k | $209k |
| 42070 | Milburn | Carlisle County | PO Box or unique | – | – | – |
| 42071 | Murray | Calloway County | 30,981 | 148 | $50k | $190k |
| 42076 | New Concord | Calloway County | 992 | 24 | $36k | $163k |
| 42078 | Salem | Livingston County | 1,702 | 19 | $56k | $85k |
| 42079 | Sedalia | Graves County | 1,315 | 24 | $59k | $119k |
| 42081 | Smithland | Livingston County | 2,161 | 19 | $93k | $167k |
| 42082 | Symsonia | Graves County | 1,803 | 65 | $67k | $223k |
| 42083 | Tiline | Livingston County | 422 | 17 | $54k | – |
| 42085 | Water Valley | Graves County | 914 | 32 | $58k | $106k |
| 42086 | West Paducah | McCracken County | 3,775 | 121 | $78k | $179k |
| 42087 | Wickliffe | Ballard County | 2,089 | 31 | $59k | $144k |
| 42088 | Wingo | Graves County | 2,497 | 37 | $53k | $135k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.