Knox County, KY ZIP codes
There are 16 ZIP codes in Knox County, KY, in 16 towns, from 40734 to 40997. The largest are 40906 (Barbourville), 40734 (Gray) and 40935 (Flat Lick). 1 more crosses into it from a neighbouring county: 40701.
The county seat is Barbourville.
- ZIP codes
- 16
- Partly in it
- 1 more
- Towns
- 16
- County seat
- Barbourville
- County FIPS
21121- State
- Kentucky
- Population
- 29,865
- Median household income
- $32,527
- Land area
- 386 sq mi
- Metro area
- Corbin
Knox County ZIP codes by town
- Barbourville (county seat)
- 40906
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Knox County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Knox County.
- 40701 Corbin · mostly in Whitley County
Map of Knox County ZIP codes
The ZIP codes of Knox County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Knox County in numbers
About 29,865 people live in Knox County, in 11,711 households, the 36th most populous of Kentucky's 120 counties. The median household income is $32,527 a year, 49% below the Kentucky median of $63,726 (US: $80,734). The median owner-occupied home is valued at $118,700 (42% below the Kentucky median), and median gross rent is $681 a month. The median age is 39.7; 13.6% of adults 25 and over hold a bachelor's degree or higher (27.6% across Kentucky); the average commute takes 24 minutes.
| Population | 29,865 |
|---|---|
| Households | 11,711 |
| Median age | 39.7 |
| Median household income | $32,527 |
| Median home value | $118,700 |
| Median gross rent | $681 |
| Bachelor's degree or higher | 13.6% |
| Mean commute | 24.4 min |
| Population density | 77 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Knox County
| Town | ZIP codes | Population |
|---|---|---|
| Gray | 1 | 3,602 |
| Barbourville | 1 | 3,146 |
| Woodbine | 1 | 1,915 |
| Girdler | 1 | 1,117 |
| Cannon | 1 | 679 |
| Flat Lick | 1 | 634 |
| Bimble | 1 | 564 |
| Heidrick | 1 | 468 |
| Hinkle | 1 | 454 |
| Artemus | 1 | 426 |
| Walker | 1 | 404 |
| Scalf | 1 | 168 |
| Bryants Store | 1 | 147 |
| Trosper | 1 | 120 |
| Green Road | 1 | 28 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Knox County.
Not sure you are in Knox County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Knox County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
40734 | Gray , KY | Standard | 3,602 | $42,500 | $131,700 |
40771 | Woodbine , KY | Standard | 1,915 | — | $125,600 |
40903 | Artemus , KY | Standard | 558 | $60,833 | $38,500 |
40906 | Barbourville , KY | Standard | 10,813 | $23,375 | $129,100 |
40915 | Bimble , KY | Standard | 564 | $41,822 | under $10,000 |
40921 | Bryants Store , KY | Standard | 147 | — | — |
40923 | Cannon , KY | Standard | 679 | $47,865 | $165,000 |
40930 | Dewitt , KY | No street area | — | — | — |
40935 | Flat Lick , KY | Standard | 1,748 | $23,157 | $41,700 |
40943 | Girdler , KY | Standard | 1,117 | $67,143 | — |
40946 | Green Road , KY | Standard | 28 | — | — |
40949 | Heidrick , KY | Standard | 468 | $54,688 | $134,700 |
40953 | Hinkle , KY | Standard | 454 | $16,375 | — |
40982 | Scalf , KY | Standard | 168 | $16,442 | $117,000 |
40995 | Trosper , KY | Standard | 120 | $36,188 | — |
40997 | Walker , KY | Standard | 404 | — | $64,100 |
Cite this page
zipcodes.pro. “Knox County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ky/county/knox
Underlying data is public domain or openly licensed — sources, vintages and licences.