ZIP Code 75166 — Lavon, TX
75166 is a standard (street delivery) ZIP code serving Lavon, Texas, in Collin 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 75166 at a glance
| ZIP code | 75166 |
|---|---|
| Primary city | Lavon |
| State | Texas (TX) |
| County | Collin FIPS 48085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,989 |
| Coordinates | 33.016710, -96.449500 |
How ZIP+4 works in 75166
The four digits after the hyphen encode a delivery segment inside 75166. 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 75166 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 75166.
| ZIP | City | Distance |
|---|---|---|
| 75173 | Nevada, TX | 4.7 mi |
| 75087 | Rockwall, TX | 4.9 mi |
| 75098 | Wylie, TX | 5 mi |
| 75132 | Fate, TX | 6.7 mi |
| 75089 | Rowlett, TX | 8 mi |
| 75048 | Sachse, TX | 8.3 mi |
| 75164 | Josephine, TX | 9.2 mi |
| 75189 | Royse City, TX | 9.4 mi |
| 75407 | Princeton, TX | 9.5 mi |
| 75094 | Plano, TX | 9.6 mi |
| 75088 | Rowlett, TX | 10 mi |
| 75002 | Allen, TX | 10.4 mi |
Questions about 75166
What is the ZIP+4 code for 75166?
75166 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 75166, you need to look up a specific street address to get them.
What city is 75166?
75166 is assigned to Lavon, Texas, in Collin 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.