ZIP Code 19401 — Norristown, PA
19401 is a standard (street delivery) ZIP code serving Norristown, Pennsylvania, in Montgomery 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 19401 at a glance
| ZIP code | 19401 |
|---|---|
| Primary city | Norristown |
| State | Pennsylvania (PA) |
| County | Montgomery FIPS 42091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 43,359 |
| Coordinates | 40.130420, -75.331430 |
How ZIP+4 works in 19401
The four digits after the hyphen encode a delivery segment inside 19401. 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 19401 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.
Other ZIP codes in Norristown
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 19401.
| ZIP | City | Distance |
|---|---|---|
| 19405 | Bridgeport, PA | 2.1 mi |
| 19462 | Plymouth Meeting, PA | 2.7 mi |
| 19403 | Norristown, PA | 2.9 mi |
| 19422 | Blue Bell, PA | 3.4 mi |
| 19406 | King Of Prussia, PA | 3.7 mi |
| 19428 | Conshohocken, PA | 3.8 mi |
| 19490 | Worcester, PA | 4.7 mi |
| 19444 | Lafayette Hill, PA | 5.1 mi |
| 19437 | Gwynedd Valley, PA | 5.7 mi |
| 19087 | Wayne, PA | 6 mi |
| 19035 | Gladwyne, PA | 6.2 mi |
| 19031 | Flourtown, PA | 6.2 mi |
Questions about 19401
What is the ZIP+4 code for 19401?
19401 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 19401, you need to look up a specific street address to get them.
What city is 19401?
19401 is assigned to Norristown, Pennsylvania, in Montgomery 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.