ZIP Code 78118 — Karnes City, TX
78118 is a standard (street delivery) ZIP code serving Karnes City, Texas, in Karnes 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 78118 at a glance
| ZIP code | 78118 |
|---|---|
| Primary city | Karnes City |
| State | Texas (TX) |
| County | Karnes FIPS 48255 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,676 |
| Coordinates | 28.875740, -97.947290 |
How ZIP+4 works in 78118
The four digits after the hyphen encode a delivery segment inside 78118. 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 78118 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 78118.
| ZIP | City | Distance |
|---|---|---|
| 78117 | Hobson, TX | 5.2 mi |
| 78144 | Panna Maria, TX | 6.5 mi |
| 78119 | Kenedy, TX | 11.1 mi |
| 78113 | Falls City, TX | 12.4 mi |
| 78151 | Runge, TX | 14.4 mi |
| 78147 | Poth, TX | 15.8 mi |
| 78145 | Pawnee, TX | 16.1 mi |
| 78111 | Ecleto, TX | 16.7 mi |
| 78062 | Peggy, TX | 17.5 mi |
| 78141 | Nordheim, TX | 19.7 mi |
| 78146 | Pettus, TX | 19.9 mi |
| 78116 | Gillett, TX | 20 mi |
Questions about 78118
What is the ZIP+4 code for 78118?
78118 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 78118, you need to look up a specific street address to get them.
What city is 78118?
78118 is assigned to Karnes City, Texas, in Karnes 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.