ZIP Code 37803 — Maryville, TN
37803 is a standard (street delivery) ZIP code serving Maryville, 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 37803 at a glance
| ZIP code | 37803 |
|---|---|
| Primary city | Maryville |
| State | Tennessee (TN) |
| County | Blount FIPS 47009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 33,822 |
| Coordinates | 35.671150, -83.977610 |
How ZIP+4 works in 37803
The four digits after the hyphen encode a delivery segment inside 37803. 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 37803 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.
Other ZIP codes in Maryville
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 37803.
| ZIP | City | Distance |
|---|---|---|
| 37878 | Tallassee, TN | 5.3 mi |
| 37801 | Maryville, TN | 6 mi |
| 37701 | Alcoa, TN | 8.5 mi |
| 37804 | Maryville, TN | 9.6 mi |
| 37882 | Townsend, TN | 9.9 mi |
| 37737 | Friendsville, TN | 9.9 mi |
| 37886 | Walland, TN | 10.7 mi |
| 37742 | Greenback, TN | 11.4 mi |
| 37777 | Louisville, TN | 11.6 mi |
| 37853 | Rockford, TN | 12.1 mi |
| 37885 | Vonore, TN | 14.2 mi |
| 37922 | Knoxville, TN | 14.8 mi |
Questions about 37803
What is the ZIP+4 code for 37803?
37803 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 37803, you need to look up a specific street address to get them.
What city is 37803?
37803 is assigned to Maryville, 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.