Union County, Tennessee ZIP codes
3 ZIP codes are in Union County, plus 8 that cross in from neighboring counties. It's part of the Knoxville, TN metro area.
- ZIP codes
- 3
- Population in these ZIPs
- 17,186
- Avg. median income
- $62,300population-weighted
- Cities & towns
- 3
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Union County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 37779 | Luttrell | 3,649 | $51,357 | $239,900 |
| 37807 | Maynardville | 11,069 | $62,673 | $288,900 |
| 37866 | Sharps Chapel | 2,468 | $77,091 | $412,400 |
ZIP codes partly in Union County
These ZIP codes are mostly in a neighboring county but cover part of Union County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 37705 | Andersonville | Anderson County | 5,239 | $79,262 | $421,500 |
| 37721 | Corryton | Knox County | 14,306 | $64,892 | $329,500 |
| 37754 | Heiskell | Anderson County | 4,211 | $75,774 | $326,800 |
| 37825 | New Tazewell | Claiborne County | 8,409 | $49,625 | $239,600 |
| 37848 | Powder Springs | Grainger County | 145 | — | $236,900 |
| 37870 | Speedwell | Claiborne County | 4,385 | $55,516 | $227,700 |
| 37888 | Washburn | Grainger County | 3,432 | $45,669 | $239,300 |
| 37938 | Knoxville | Knox County | 17,437 | $84,135 | $388,600 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Union County
Nearby counties
Frequently asked questions
How many ZIP codes are in Union County, Tennessee?
3 ZIP codes are mainly in Union County, and 8 more ZIP codes from neighboring areas reach partly into it.
What cities are in Union County?
ZIP codes in Union County use the city names Luttrell, Maynardville and Sharps Chapel.
What metro area is Union County in?
Union County is part of the Knoxville, TN metropolitan statistical area.