ZIP Code 75840 — Fairfield, TX
75840 is a standard (street delivery) ZIP code serving Fairfield, Texas, in Freestone 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 75840 at a glance
| ZIP code | 75840 |
|---|---|
| Primary city | Fairfield |
| State | Texas (TX) |
| County | Freestone FIPS 48161 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,994 |
| Coordinates | 31.784120, -96.085520 |
How ZIP+4 works in 75840
The four digits after the hyphen encode a delivery segment inside 75840. 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 75840 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 75840.
| ZIP | City | Distance |
|---|---|---|
| 75886 | Tennessee Colony, TX | 10.2 mi |
| 75884 | Tennessee Colony, TX | 11.3 mi |
| 75859 | Streetman, TX | 12.1 mi |
| 75861 | Tennessee Colony, TX | 12.5 mi |
| 75848 | Kirvin, TX | 14.6 mi |
| 75860 | Teague, TX | 14.6 mi |
| 75853 | Montalba, TX | 19.2 mi |
| 75855 | Oakwood, TX | 20.6 mi |
| 76693 | Wortham, TX | 20.8 mi |
| 76681 | Richland, TX | 22.6 mi |
| 75838 | Donie, TX | 22.6 mi |
| 75751 | Athens, TX | 22.6 mi |
Questions about 75840
What is the ZIP+4 code for 75840?
75840 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 75840, you need to look up a specific street address to get them.
What city is 75840?
75840 is assigned to Fairfield, Texas, in Freestone 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.