First three digits · Tennessee
ZIP Codes Starting with
53 ZIP codes start with 377, sorted at the Knoxville, TN (SCF 377) sectional center (USPS labeling list L005, effective October 1, 2026) in Tennessee: 48 residential ZIP codes across 19 counties and 5 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 377 mean?
The first digit, 3, is one of ten national areas (Alabama, Florida, Georgia, Mississippi, Tennessee and Armed Forces Americas). The first three, 377, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 377 to the Knoxville, TN (SCF 377) facility. The last two digits pick the delivery area. By residents, the largest town names among the 377 ZIP codes are Greeneville, Lenoir City, Clinton, Loudon, La Follette and Dandridge.
The same facility sorts 10 prefixes, 340 ZIP codes in all: 377, 378, 379, 407, 408, 409, 417, 418, 425, 426.
Where are the 377 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 377
| County | ||||||
|---|---|---|---|---|---|---|
| 37701 | Alcoa | Blount County | 10,247 | 954 | $66k | $281k |
| 37705 | Andersonville | Anderson County | 5,239 | 117 | $79k | $286k |
| 37707 | Arthur | Claiborne County | PO Box or unique | – | – | – |
| 37708 | Bean Station | Grainger County | 6,512 | 158 | $42k | $169k |
| 37709 | Blaine | Grainger County | 4,177 | 101 | $76k | $275k |
| 37710 | Briceville | Anderson County | 1,083 | 13 | $28k | $91k |
| 37711 | Bulls Gap | Hawkins County | 5,644 | 108 | $42k | $122k |
| 37713 | Bybee | Cocke County | 1,425 | 48 | $54k | $154k |
| 37714 | Caryville | Campbell County | 4,421 | 69 | $56k | $228k |
| 37715 | Clairfield | Claiborne County | 806 | 32 | $26k | $150k |
| 37716 | Clinton | Anderson County | 27,425 | 329 | $65k | $244k |
| 37717 | Clinton | Anderson County | PO Box or unique | – | – | – |
| 37719 | Coalfield | Morgan County | 45 | 69 | – | – |
| 37721 | Corryton | Knox County | 14,306 | 290 | $65k | $233k |
| 37722 | Cosby | Cocke County | 6,708 | 75 | $55k | $204k |
| 37723 | Crab Orchard | Cumberland County | 1,420 | 25 | $61k | $168k |
| 37724 | Cumberland Gap | Claiborne County | 2,214 | 103 | $32k | $149k |
| 37725 | Dandridge | Jefferson County | 18,301 | 196 | $68k | $262k |
| 37726 | Deer Lodge | Morgan County | 2,556 | 28 | $67k | $178k |
| 37727 | Del Rio | Cocke County | 1,936 | 17 | $48k | $133k |
| 37729 | Duff | Campbell County | 1,279 | 26 | $43k | $112k |
| 37730 | Eagan | Claiborne County | 33 | 22 | $45k | $110k |
| 37731 | Eidson | Hawkins County | 564 | 11 | $53k | – |
| 37732 | Elgin | Scott County | no residents | 0 | – | – |
| 37733 | Rugby | Morgan County | no residents | 0 | – | – |
| 37737 | Friendsville | Blount County | 7,081 | 265 | $82k | $321k |
| 37738 | Gatlinburg | Sevier County | 4,952 | 23 | $57k | $334k |
| 37742 | Greenback | Loudon County | 7,046 | 143 | $89k | $302k |
| 37743 | Greeneville | Greene County | 24,548 | 110 | $55k | $215k |
| 37744 | Greeneville | Greene County | PO Box or unique | – | – | – |
| 37745 | Greeneville | Greene County | 21,090 | 173 | $57k | $214k |
| 37748 | Harriman | Roane County | 17,575 | 165 | $65k | $197k |
| 37752 | Harrogate | Claiborne County | 6,185 | 131 | $60k | $194k |
| 37753 | Hartford | Cocke County | 917 | 29 | $49k | $100k |
| 37754 | Heiskell | Anderson County | 4,211 | 110 | $76k | $196k |
| 37755 | Helenwood | Scott County | 3,404 | 90 | $46k | $159k |
| 37756 | Huntsville | Scott County | 2,881 | 24 | $35k | $108k |
| 37757 | Jacksboro | Campbell County | 10,100 | 357 | $63k | $212k |
| 37760 | Jefferson City | Jefferson County | 13,253 | 326 | $66k | $238k |
| 37762 | Jellico | Campbell County | 2,536 | 166 | $42k | $143k |
| 37763 | Kingston | Roane County | 16,984 | 198 | $81k | $259k |
| 37764 | Kodak | Sevier County | 12,562 | 369 | $71k | $284k |
| 37765 | Kyles Ford | Hancock County | 370 | 19 | $23k | $88k |
| 37766 | La Follette | Campbell County | 18,554 | 135 | $50k | $188k |
| 37769 | Rocky Top | Anderson County | 5,848 | 195 | $61k | $183k |
| 37770 | Lancing | Morgan County | 2,756 | 20 | $48k | $127k |
| 37771 | Lenoir City | Loudon County | 18,042 | 360 | $67k | $280k |
| 37772 | Lenoir City | Loudon County | 14,646 | 379 | $101k | $430k |
| 37773 | Lone Mountain | Claiborne County | PO Box or unique | – | – | – |
| 37774 | Loudon | Loudon County | 21,784 | 247 | $88k | $365k |
| 37777 | Louisville | Blount County | 12,877 | 392 | $76k | $346k |
| 37778 | Lowland | Hamblen County | PO Box or unique | – | – | – |
| 37779 | Luttrell | Union County | 3,649 | 106 | $51k | $163k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.