ZIP Code 84756 — Newcastle, UT
84756 is a standard (street delivery) ZIP code serving Newcastle, Utah, in Iron 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 84756 at a glance
| ZIP code | 84756 |
|---|---|
| Primary city | Newcastle |
| State | Utah (UT) |
| County | Iron FIPS 49021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 390 |
| Coordinates | 37.742490, -113.547720 |
How ZIP+4 works in 84756
The four digits after the hyphen encode a delivery segment inside 84756. 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 84756 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 84756.
| ZIP | City | Distance |
|---|---|---|
| 84714 | Beryl, UT | 13.5 mi |
| 84722 | Central, UT | 17.8 mi |
| 84725 | Enterprise, UT | 18.9 mi |
| 84720 | Cedar City, UT | 20.5 mi |
| 84721 | Cedar City, UT | 22.7 mi |
| 84753 | Modena, UT | 23.1 mi |
| 84781 | Pine Valley, UT | 23.2 mi |
| 84757 | New Harmony, UT | 25.7 mi |
| 84742 | Kanarraville, UT | 26.7 mi |
| 84782 | Veyo, UT | 27.3 mi |
| 84783 | Dammeron Valley, UT | 32.1 mi |
| 84733 | Gunlock, UT | 33.7 mi |
Questions about 84756
What is the ZIP+4 code for 84756?
84756 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 84756, you need to look up a specific street address to get them.
What city is 84756?
84756 is assigned to Newcastle, Utah, in Iron 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.