ZIP Code 37777 — Louisville, TN
37777 is a standard (street delivery) ZIP code serving Louisville, Tennessee, in Blount 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 37777 at a glance
| ZIP code | 37777 |
|---|---|
| Primary city | Louisville |
| State | Tennessee (TN) |
| County | Blount FIPS 47009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 12,877 |
| Coordinates | 35.827420, -84.051860 |
How ZIP+4 works in 37777
The four digits after the hyphen encode a delivery segment inside 37777. 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 37777 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 37777.
| ZIP | City | Distance |
|---|---|---|
| 37922 | Knoxville, TN | 3.6 mi |
| 37701 | Alcoa, TN | 4.4 mi |
| 37737 | Friendsville, TN | 6.1 mi |
| 37919 | Knoxville, TN | 6.6 mi |
| 37923 | Knoxville, TN | 7.1 mi |
| 37934 | Farragut, TN | 7.8 mi |
| 37853 | Rockford, TN | 8 mi |
| 37909 | Knoxville, TN | 8.4 mi |
| 37804 | Maryville, TN | 9.2 mi |
| 37772 | Lenoir City, TN | 9.7 mi |
| 37932 | Knoxville, TN | 10.4 mi |
| 37921 | Knoxville, TN | 10.8 mi |
Questions about 37777
What is the ZIP+4 code for 37777?
37777 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 37777, you need to look up a specific street address to get them.
What city is 37777?
37777 is assigned to Louisville, Tennessee, in Blount 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.