ZIP Code 16030 — Eau Claire, PA
16030 is a standard (street delivery) ZIP code serving Eau Claire, Pennsylvania, in Butler 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 16030 at a glance
| ZIP code | 16030 |
|---|---|
| Primary city | Eau Claire |
| State | Pennsylvania (PA) |
| County | Butler FIPS 42019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 272 |
| Coordinates | 41.136190, -79.796990 |
How ZIP+4 works in 16030
The four digits after the hyphen encode a delivery segment inside 16030. 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 16030 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 16030.
| ZIP | City | Distance |
|---|---|---|
| 16040 | Hilliards, PA | 3.8 mi |
| 16020 | Boyers, PA | 5.3 mi |
| 16048 | North Washington, PA | 5.8 mi |
| 16372 | Clintonville, PA | 6 mi |
| 16050 | Petrolia, PA | 6.5 mi |
| 16022 | Bruin, PA | 6.5 mi |
| 16036 | Foxburg, PA | 6.6 mi |
| 16049 | Parker, PA | 7 mi |
| 16373 | Emlenton, PA | 7.1 mi |
| 16054 | Saint Petersburg, PA | 7.4 mi |
| 16038 | Harrisville, PA | 8.1 mi |
| 16374 | Kennerdell, PA | 8.7 mi |
Questions about 16030
What is the ZIP+4 code for 16030?
16030 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 16030, you need to look up a specific street address to get them.
What city is 16030?
16030 is assigned to Eau Claire, Pennsylvania, in Butler 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.