ZIP Code 17018 — Dauphin, PA
17018 is a standard (street delivery) ZIP code serving Dauphin, Pennsylvania, in Dauphin 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 17018 at a glance
| ZIP code | 17018 |
|---|---|
| Primary city | Dauphin |
| State | Pennsylvania (PA) |
| County | Dauphin FIPS 42043 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,902 |
| Coordinates | 40.402460, -76.881170 |
How ZIP+4 works in 17018
The four digits after the hyphen encode a delivery segment inside 17018. 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 17018 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 17018.
| ZIP | City | Distance |
|---|---|---|
| 17110 | Harrisburg, PA | 5.8 mi |
| 17112 | Harrisburg, PA | 6.1 mi |
| 17069 | New Buffalo, PA | 6.4 mi |
| 17093 | Summerdale, PA | 6.8 mi |
| 17032 | Halifax, PA | 7.2 mi |
| 17109 | Harrisburg, PA | 8.3 mi |
| 17020 | Duncannon, PA | 8.6 mi |
| 17103 | Harrisburg, PA | 8.8 mi |
| 17025 | Enola, PA | 9 mi |
| 17102 | Harrisburg, PA | 9.1 mi |
| 17120 | Harrisburg, PA | 9.5 mi |
| 17053 | Marysville, PA | 9.6 mi |
Questions about 17018
What is the ZIP+4 code for 17018?
17018 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 17018, you need to look up a specific street address to get them.
What city is 17018?
17018 is assigned to Dauphin, Pennsylvania, in Dauphin 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.