ZIP Code 30078 — Snellville, GA
30078 is a standard (street delivery) ZIP code serving Snellville, Georgia, in Gwinnett 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 30078 at a glance
| ZIP code | 30078 |
|---|---|
| Primary city | Snellville |
| State | Georgia (GA) |
| County | Gwinnett FIPS 13135 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 41,597 |
| Coordinates | 33.861180, -84.017950 |
How ZIP+4 works in 30078
The four digits after the hyphen encode a delivery segment inside 30078. 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 30078 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 Snellville
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 30078.
| ZIP | City | Distance |
|---|---|---|
| 30017 | Grayson, GA | 3.7 mi |
| 30039 | Snellville, GA | 4.4 mi |
| 30044 | Lawrenceville, GA | 5.1 mi |
| 30047 | Lilburn, GA | 5.5 mi |
| 30046 | Lawrenceville, GA | 6.3 mi |
| 30045 | Lawrenceville, GA | 6.9 mi |
| 30087 | Stone Mountain, GA | 7.4 mi |
| 30052 | Loganville, GA | 7.7 mi |
| 30093 | Norcross, GA | 9.8 mi |
| 30043 | Lawrenceville, GA | 9.8 mi |
| 30012 | Conyers, GA | 10 mi |
| 30058 | Lithonia, GA | 10 mi |
Questions about 30078
What is the ZIP+4 code for 30078?
30078 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 30078, you need to look up a specific street address to get them.
What city is 30078?
30078 is assigned to Snellville, Georgia, in Gwinnett 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.