County ZIP codes · Tennessee · FIPS 47145
Roane County, TN ZIP Codes
Roane County, Tennessee has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones lie mainly in Roane County and 6 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $55,856 in 37854 (Rockwood) to $87,718 in 37774 (Loudon) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Roane 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 $64,883 and $72,269.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 9 residential ZIP codes in Roane County
3 ZIP codes lie mainly in Roane County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37748 | Harriman | 17,575 | 165 | $65k | $197k | 70% |
| 37763 | Kingston | 16,984 | 198 | $81k | $259k | 100% |
| 37854 | Rockwood | 12,478 | 91 | $56k | $178k | 44% |
Partly in Roane County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37830 | Oak Ridge | 33,038 | 390 | $72k | $271k | 48% |
| 37880 | Ten Mile | 3,599 | 49 | $65k | $216k | 42% |
| 37846 | Philadelphia | 4,579 | 63 | $72k | $202k | 39% |
| 37771 | Lenoir City | 18,042 | 360 | $67k | $280k | 25% |
| 37840 | Oliver Springs | 10,004 | 124 | $76k | $204k | 19% |
| 37774 | Loudon | 21,784 | 247 | $88k | $365k | 13% |
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?
8 ZIP codes of Roane County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Roane | Elsewhere |
|---|---|---|
| 37830 | 48% | Anderson County 52% |
| 37774 | 13% | Loudon County 86%; Monroe County 1% |
| 37771 | 25% | Loudon County 75% |
| 37748 | 70% | Morgan County 30% |
| 37854 | 44% | Cumberland County 42%; Morgan County 13% |
| 37840 | 19% | Morgan County 44%; Anderson County 37% |
| 37846 | 39% | Loudon County 43%; Monroe County 15%; McMinn County 4% |
| 37880 | 42% | Meigs County 57% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Roane County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Roane County's ZIP codes use 2 prefixes: 377 and 378.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.