ZIP Code 16423 — Lake City, PA
16423 is a standard (street delivery) ZIP code serving Lake City, Pennsylvania, in Erie 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 16423 at a glance
| ZIP code | 16423 |
|---|---|
| Primary city | Lake City |
| State | Pennsylvania (PA) |
| County | Erie FIPS 42049 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,857 |
| Coordinates | 42.018810, -80.342530 |
How ZIP+4 works in 16423
The four digits after the hyphen encode a delivery segment inside 16423. 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 16423 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 16423.
| ZIP | City | Distance |
|---|---|---|
| 16417 | Girard, PA | 3.7 mi |
| 16430 | North Springfield, PA | 4 mi |
| 16415 | Fairview, PA | 5.9 mi |
| 16411 | East Springfield, PA | 6.2 mi |
| 16410 | Cranesville, PA | 7.1 mi |
| 16443 | West Springfield, PA | 8.9 mi |
| 16475 | Albion, PA | 9.9 mi |
| 16506 | Erie, PA | 10.1 mi |
| 16401 | Albion, PA | 10.1 mi |
| 16426 | Mckean, PA | 10.7 mi |
| 16505 | Erie, PA | 12.3 mi |
| 16412 | Edinboro, PA | 13.1 mi |
Questions about 16423
What is the ZIP+4 code for 16423?
16423 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 16423, you need to look up a specific street address to get them.
What city is 16423?
16423 is assigned to Lake City, Pennsylvania, in Erie 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.