ZIP Code 73840 — Fargo, OK
73840 is a standard (street delivery) ZIP code serving Fargo, Oklahoma, in Ellis 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 73840 at a glance
| ZIP code | 73840 |
|---|---|
| Primary city | Fargo |
| State | Oklahoma (OK) |
| County | Ellis FIPS 40045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 509 |
| Coordinates | 36.394360, -99.645810 |
How ZIP+4 works in 73840
The four digits after the hyphen encode a delivery segment inside 73840. 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 73840 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 73840.
| ZIP | City | Distance |
|---|---|---|
| 73843 | Gage, OK | 10.5 mi |
| 73841 | Fort Supply, OK | 10.7 mi |
| 73801 | Woodward, OK | 13.1 mi |
| 73851 | May, OK | 14.5 mi |
| 73857 | Sharon, OK | 19.3 mi |
| 73858 | Shattuck, OK | 21.9 mi |
| 73832 | Arnett, OK | 23.6 mi |
| 73859 | Vici, OK | 27.2 mi |
| 73848 | Laverne, OK | 27.3 mi |
| 79034 | Follett, TX | 28.9 mi |
| 73853 | Mutual, OK | 29.1 mi |
| 73852 | Mooreland, OK | 30.6 mi |
Questions about 73840
What is the ZIP+4 code for 73840?
73840 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 73840, you need to look up a specific street address to get them.
What city is 73840?
73840 is assigned to Fargo, Oklahoma, in Ellis 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.