ZIP Code 37774 — Loudon, TN
37774 is a standard (street delivery) ZIP code serving Loudon, Tennessee, in Loudon County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 37774 at a glance
| ZIP code | 37774 |
|---|---|
| Primary city | Loudon |
| State | Tennessee (TN) |
| County | Loudon FIPS 47105 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 21,784 |
| Coordinates | 35.731700, -84.355260 |
How ZIP+4 works in 37774
The four digits after the hyphen encode a delivery segment inside 37774. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 37774 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 37774.
| ZIP | City | Distance |
|---|---|---|
| 37771 | Lenoir City, TN | 7.6 mi |
| 37846 | Philadelphia, TN | 8.1 mi |
| 37772 | Lenoir City, TN | 8.6 mi |
| 37763 | Kingston, TN | 10 mi |
| 37742 | Greenback, TN | 10.5 mi |
| 37874 | Sweetwater, TN | 10.9 mi |
| 37737 | Friendsville, TN | 13.3 mi |
| 37934 | Farragut, TN | 13.9 mi |
| 37801 | Maryville, TN | 15.7 mi |
| 37932 | Knoxville, TN | 15.9 mi |
| 37354 | Madisonville, TN | 15.9 mi |
| 37830 | Oak Ridge, TN | 16.4 mi |
Questions about 37774
What is the ZIP+4 code for 37774?
37774 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 37774, you need to look up a specific street address to get them.
What city is 37774?
37774 is assigned to Loudon, Tennessee, in Loudon County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.