Loudon County, Tennessee ZIP codes
5 ZIP codes are in Loudon County, plus 4 that cross in from neighboring counties. It's part of the Knoxville, TN metro area.
- ZIP codes
- 5
- Population in these ZIPs
- 66,097
- Avg. median income
- $84,000population-weighted
- Cities & towns
- 4
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Loudon County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 37742 | Greenback | 7,046 | $88,983 | $442,900 |
| 37771 | Lenoir City | 18,042 | $66,938 | $340,000 |
| 37772 | Lenoir City | 14,646 | $100,711 | $508,200 |
| 37774 | Loudon | 21,784 | $87,718 | $499,700 |
| 37846 | Philadelphia | 4,579 | $71,786 | $282,400 |
ZIP codes partly in Loudon County
These ZIP codes are mostly in a neighboring county but cover part of Loudon County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 37737 | Friendsville | Blount County | 7,081 | $81,706 | $434,500 |
| 37874 | Sweetwater | Monroe County | 16,567 | $53,605 | $262,200 |
| 37885 | Vonore | Monroe County | 6,271 | $78,793 | $490,200 |
| 37922 | Knoxville | Knox County | 40,394 | $132,807 | $640,300 |
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 Loudon County
Nearby counties
Frequently asked questions
How many ZIP codes are in Loudon County, Tennessee?
5 ZIP codes are mainly in Loudon County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Loudon County?
ZIP codes in Loudon County use the city names Greenback, Lenoir City, Loudon and Philadelphia.
What metro area is Loudon County in?
Loudon County is part of the Knoxville, TN metropolitan statistical area.