ZIP Code 16689 — Waterfall, PA
16689 is a standard (street delivery) ZIP code serving Waterfall, Pennsylvania, in Fulton 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 16689 at a glance
| ZIP code | 16689 |
|---|---|
| Primary city | Waterfall |
| State | Pennsylvania (PA) |
| County | Fulton FIPS 42057 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 389 |
| Coordinates | 40.107370, -78.100280 |
How ZIP+4 works in 16689
The four digits after the hyphen encode a delivery segment inside 16689. 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 16689 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 16689.
| ZIP | City | Distance |
|---|---|---|
| 16691 | Wells Tannery, PA | 3.2 mi |
| 16694 | Wood, PA | 4.7 mi |
| 17229 | Hustontown, PA | 5.1 mi |
| 16674 | Robertsdale, PA | 5.6 mi |
| 16679 | Six Mile Run, PA | 6 mi |
| 17264 | Three Springs, PA | 7.5 mi |
| 17228 | Harrisonville, PA | 7.7 mi |
| 16633 | Defiance, PA | 7.9 mi |
| 16634 | Dudley, PA | 8.1 mi |
| 16621 | Broad Top, PA | 8.5 mi |
| 16672 | Riddlesburg, PA | 8.7 mi |
| 17253 | Saltillo, PA | 8.8 mi |
Questions about 16689
What is the ZIP+4 code for 16689?
16689 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 16689, you need to look up a specific street address to get them.
What city is 16689?
16689 is assigned to Waterfall, Pennsylvania, in Fulton 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.