County ZIP codes · Tennessee · FIPS 47065
Hamilton County, TN ZIP Codes
Hamilton County, Tennessee has 37 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 31 residential and 6 for PO boxes or a single organization. 26 of the residential ones lie mainly in Hamilton County and 5 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $35,845 in 37407 (Chattanooga) to $201,000 in 37350 (Lookout Mountain) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Hamilton 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 $56,637 and $82,517.
They carry 16 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 31 residential ZIP codes in Hamilton County
26 ZIP codes lie mainly in Hamilton County; 5 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37421 | Chattanooga | 52,985 | 1,671 | $83k | $334k | 100% |
| 37343 | Hixson | 45,101 | 1,071 | $82k | $307k | 100% |
| 37363 | Ooltewah | 42,093 | 700 | $97k | $377k | 100% |
| 37379 | Soddy Daisy | 29,430 | 277 | $89k | $307k | 88% |
| 37415 | Chattanooga | 24,181 | 1,380 | $71k | $285k | 100% |
| 37412 | Chattanooga | 21,864 | 2,525 | $63k | $210k | 100% |
| 37411 | Chattanooga | 18,997 | 2,588 | $57k | $232k | 100% |
| 37377 | Signal Mountain | 17,188 | 214 | $120k | $530k | 50% |
| 37341 | Harrison | 15,591 | 462 | $92k | $291k | 100% |
| 37404 | Chattanooga | 14,737 | 2,844 | $57k | $255k | 100% |
| 37416 | Chattanooga | 13,919 | 678 | $71k | $253k | 100% |
| 37406 | Chattanooga | 13,364 | 1,101 | $45k | $168k | 100% |
| 37407 | Chattanooga | 9,156 | 2,693 | $36k | $99k | 100% |
| 37403 | Chattanooga | 6,413 | 3,761 | $81k | $525k | 100% |
| 37302 | Apison | 5,082 | 294 | $129k | $420k | 100% |
| 37336 | Georgetown | 4,483 | 103 | $67k | $266k | 35% |
| 37410 | Chattanooga | 4,129 | 1,365 | $29k | $153k | 100% |
| 37402 | Chattanooga | 3,953 | 3,074 | $24k | $269k | 100% |
| 37408 | Chattanooga | 3,502 | 1,648 | $81k | $468k | 100% |
| 37409 | Chattanooga | 3,357 | 760 | $75k | $267k | 100% |
| 37373 | Sale Creek | 3,273 | 81 | $55k | $311k | 100% |
| 37308 | Birchwood | 3,188 | 86 | $80k | $253k | 63% |
| 37350 | Lookout Mountain | 2,111 | 1,572 | $201k | $855k | 100% |
| 37315 | Collegedale | 1,825 | 14,370 | – | – | 100% |
| 37351 | Lupton City | 281 | 644 | $50k | $219k | 100% |
| 37450 | Chattanooga | no residents | 0 | – | – | 100% |
Partly in Hamilton County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37419 | Chattanooga | 5,980 | 122 | $75k | $352k | 49% |
| 37405 | Chattanooga | 18,109 | 333 | $81k | $461k | 25% |
| 37338 | Graysville | 3,309 | 46 | $50k | $122k | 16% |
| 37353 | McDonald | 5,330 | 132 | $74k | $253k | 13% |
| 37311 | Cleveland | 30,720 | 613 | $47k | $227k | 2% |
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?
9 ZIP codes of Hamilton County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Hamilton | Elsewhere |
|---|---|---|
| 37311 | 2% | Bradley County98% |
| 37379 | 88% | Sequatchie County6%; Bledsoe County6% |
| 37405 | 25% | Marion County75% |
| 37377 | 50% | Sequatchie County46%; Marion County4% |
| 37419 | 49% | Marion County51% |
| 37353 | 13% | Bradley County87% |
| 37336 | 35% | Meigs County35%; Bradley County30% |
| 37338 | 16% | Bledsoe County58%; Sequatchie County20%; Rhea County5% |
| 37308 | 63% | Meigs County37% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Hamilton County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Hamilton County's ZIP codes use 2 prefixes: 373 and 374.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.