First three digits · Tennessee
ZIP Codes Starting with
87 ZIP codes start with 373, sorted at the Chattanooga, TN (SCF 373) sectional center (USPS labeling list L005, effective October 1, 2026) in Tennessee: 77 residential ZIP codes across 17 counties and 10 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 373 mean?
The first digit, 3, is one of ten national areas (Alabama, Florida, Georgia, Mississippi, Tennessee and Armed Forces Americas). The first three, 373, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 373 to the Chattanooga, TN (SCF 373) facility. The last two digits pick the delivery area. By residents, the largest town names among the 373 ZIP codes are Cleveland, Hixson, Ooltewah, Manchester, Soddy Daisy and Tullahoma.
The same facility sorts 3 prefixes, 143 ZIP codes in all: 307, 373, 374.
Where are the 373 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 373
| County | ||||||
|---|---|---|---|---|---|---|
| 37301 | Altamont | Grundy County | 1,528 | 25 | $35k | $133k |
| 37302 | Apison | Hamilton County | 5,082 | 294 | $129k | $420k |
| 37303 | Athens | McMinn County | 25,688 | 172 | $62k | $232k |
| 37304 | Bakewell | Hamilton County | PO Box or unique | – | – | – |
| 37305 | Beersheba Springs | Grundy County | 1,019 | 62 | $61k | $69k |
| 37306 | Belvidere | Franklin County | 1,919 | 16 | $39k | $223k |
| 37307 | Benton | Polk County | 5,302 | 92 | $74k | $220k |
| 37308 | Birchwood | Hamilton County | 3,188 | 86 | $80k | $253k |
| 37309 | Calhoun | McMinn County | 2,136 | 54 | $64k | $173k |
| 37310 | Charleston | Bradley County | 4,370 | 102 | $82k | $271k |
| 37311 | Cleveland | Bradley County | 30,720 | 613 | $47k | $227k |
| 37312 | Cleveland | Bradley County | 36,669 | 569 | $78k | $301k |
| 37313 | Coalmont | Grundy County | 1,590 | 78 | $43k | $162k |
| 37314 | Cokercreek | Monroe County | PO Box or unique | – | – | – |
| 37315 | Collegedale | Hamilton County | 1,825 | 14,370 | – | – |
| 37316 | Conasauga | Polk County | no residents | 0 | – | – |
| 37317 | Copperhill | Polk County | 2,582 | 34 | $72k | $151k |
| 37318 | Cowan | Franklin County | 2,103 | 169 | $52k | $177k |
| 37320 | Cleveland | Bradley County | PO Box or unique | – | – | – |
| 37321 | Dayton | Rhea County | 21,084 | 185 | $55k | $193k |
| 37322 | Decatur | Meigs County | 9,101 | 68 | $58k | $171k |
| 37323 | Cleveland | Bradley County | 31,948 | 279 | $69k | $242k |
| 37324 | Decherd | Franklin County | 5,628 | 85 | $50k | $223k |
| 37325 | Delano | Polk County | 2,007 | 93 | $66k | $171k |
| 37326 | Ducktown | Polk County | 411 | 232 | – | $145k |
| 37327 | Dunlap | Sequatchie County | 13,480 | 70 | $61k | $246k |
| 37328 | Elora | Lincoln County | 1,930 | 60 | $65k | $146k |
| 37329 | Englewood | McMinn County | 6,591 | 111 | $71k | $173k |
| 37330 | Estill Springs | Franklin County | 7,204 | 185 | $71k | $214k |
| 37331 | Etowah | McMinn County | 7,613 | 193 | $56k | $194k |
| 37332 | Evensville | Rhea County | 1,724 | 25 | $60k | $188k |
| 37333 | Farner | Polk County | 513 | 25 | $27k | $143k |
| 37334 | Fayetteville | Lincoln County | 23,790 | 94 | $63k | $231k |
| 37335 | Flintville | Lincoln County | 2,527 | 57 | $66k | $201k |
| 37336 | Georgetown | Hamilton County | 4,483 | 103 | $67k | $266k |
| 37337 | Grandview | Rhea County | 1,241 | 21 | $48k | $185k |
| 37338 | Graysville | Bledsoe County | 3,309 | 46 | $50k | $122k |
| 37339 | Gruetli Laager | Grundy County | 1,319 | 33 | $49k | $148k |
| 37340 | Guild | Marion County | 288 | 34 | $13k | – |
| 37341 | Harrison | Hamilton County | 15,591 | 462 | $92k | $291k |
| 37342 | Hillsboro | Coffee County | 3,863 | 56 | $69k | $270k |
| 37343 | Hixson | Hamilton County | 45,101 | 1,071 | $82k | $307k |
| 37345 | Huntland | Franklin County | 2,659 | 47 | $59k | $190k |
| 37347 | Jasper | Marion County | 8,607 | 176 | $63k | $194k |
| 37348 | Kelso | Lincoln County | 1,044 | 35 | $40k | $266k |
| 37349 | Manchester | Coffee County | PO Box or unique | – | – | – |
| 37350 | Lookout Mountain | Hamilton County | 2,111 | 1,572 | $201k | $855k |
| 37351 | Lupton City | Hamilton County | 281 | 644 | $50k | $219k |
| 37352 | Lynchburg | Moore County | 3,166 | 63 | $68k | $341k |
| 37353 | McDonald | Bradley County | 5,330 | 132 | $74k | $253k |
| 37354 | Madisonville | Monroe County | 17,356 | 148 | $55k | $232k |
| 37355 | Manchester | Coffee County | 29,805 | 144 | $63k | $256k |
| 37356 | Monteagle | Marion County | 2,679 | 109 | $59k | $298k |
| 37357 | Morrison | Warren County | 6,210 | 46 | $59k | $168k |
| 37359 | Mulberry | Lincoln County | 1,062 | 27 | $78k | $275k |
| 37360 | Normandy | Bedford County | 1,719 | 62 | $88k | $266k |
| 37361 | Ocoee | Polk County | 2,166 | 76 | $85k | – |
| 37362 | Old Fort | Polk County | 3,430 | 51 | $52k | $123k |
| 37363 | Ooltewah | Hamilton County | 42,093 | 700 | $97k | $377k |
| 37364 | Cleveland | Bradley County | PO Box or unique | – | – | – |
| 37365 | Palmer | Grundy County | 1,678 | 30 | $55k | $131k |
| 37366 | Pelham | Grundy County | 1,216 | 23 | $59k | $189k |
| 37367 | Pikeville | Bledsoe County | 11,169 | 38 | $55k | $191k |
| 37369 | Reliance | Polk County | 713 | 7 | $59k | $115k |
| 37370 | Riceville | McMinn County | 5,414 | 88 | $61k | $222k |
| 37371 | Athens | McMinn County | PO Box or unique | – | – | – |
| 37373 | Sale Creek | Hamilton County | 3,273 | 81 | $55k | $311k |
| 37374 | Sequatchie | Marion County | 1,497 | 26 | $68k | $257k |
| 37375 | Sewanee | Franklin County | 3,866 | 56 | $71k | $367k |
| 37376 | Sherwood | Franklin County | 361 | 4 | – | $214k |
| 37377 | Signal Mountain | Hamilton County | 17,188 | 214 | $120k | $530k |
| 37378 | Smartt | Warren County | PO Box or unique | – | – | – |
| 37379 | Soddy Daisy | Hamilton County | 29,430 | 277 | $89k | $307k |
| 37380 | South Pittsburg | Marion County | 6,688 | 53 | $59k | $195k |
| 37381 | Spring City | Rhea County | 10,711 | 79 | $57k | $230k |
| 37382 | Summitville | Coffee County | PO Box or unique | – | – | – |
| 37383 | Sewanee | Franklin County | 344 | 2,356 | – | – |
| 37384 | Soddy Daisy | Hamilton County | PO Box or unique | – | – | – |
| 37385 | Tellico Plains | Monroe County | 9,015 | 34 | $61k | $217k |
| 37387 | Tracy City | Grundy County | 3,674 | 50 | $47k | $164k |
| 37388 | Tullahoma | Coffee County | 27,939 | 237 | $60k | $250k |
| 37389 | Arnold Afb | Coffee County | PO Box or unique | – | – | – |
| 37391 | Turtletown | Polk County | 1,530 | 60 | $40k | $213k |
| 37394 | Viola | Warren County | 114 | 797 | $49k | $268k |
| 37396 | Whiteside | Marion County | 44 | 9 | $26k | – |
| 37397 | Whitwell | Marion County | 10,488 | 70 | $55k | $173k |
| 37398 | Winchester | Franklin County | 15,755 | 144 | $64k | $248k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.