ZIP Code 75566 — Marietta, TX
75566 is a standard (street delivery) ZIP code serving Marietta, Texas, in Cass 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 75566 at a glance
| ZIP code | 75566 |
|---|---|
| Primary city | Marietta |
| State | Texas (TX) |
| County | Cass FIPS 48067 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 886 |
| Coordinates | 33.152560, -94.490180 |
How ZIP+4 works in 75566
The four digits after the hyphen encode a delivery segment inside 75566. 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 75566 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 75566.
| ZIP | City | Distance |
|---|---|---|
| 75568 | Naples, TX | 6.7 mi |
| 75560 | Douglassville, TX | 7.7 mi |
| 75563 | Linden, TX | 11 mi |
| 75656 | Hughes Springs, TX | 11 mi |
| 75574 | Simms, TX | 12.7 mi |
| 75567 | Maud, TX | 15 mi |
| 75571 | Omaha, TX | 16.3 mi |
| 75638 | Daingerfield, TX | 16.7 mi |
| 75551 | Atlanta, TX | 16.8 mi |
| 75630 | Avinger, TX | 19.5 mi |
| 75573 | Redwater, TX | 20.2 mi |
| 75562 | Kildare, TX | 20.3 mi |
Questions about 75566
What is the ZIP+4 code for 75566?
75566 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 75566, you need to look up a specific street address to get them.
What city is 75566?
75566 is assigned to Marietta, Texas, in Cass 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.