ZIP Code 77373 — Spring, TX
77373 is a standard (street delivery) ZIP code serving Spring, Texas, in Harris 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 77373 at a glance
| ZIP code | 77373 |
|---|---|
| Primary city | Spring |
| State | Texas (TX) |
| County | Harris FIPS 48201 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 69,739 |
| Coordinates | 30.061430, -95.384230 |
How ZIP+4 works in 77373
The four digits after the hyphen encode a delivery segment inside 77373. 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 77373 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 Spring
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 77373.
| ZIP | City | Distance |
|---|---|---|
| 77386 | Spring, TX | 3.2 mi |
| 77073 | Houston, TX | 4.4 mi |
| 77388 | Spring, TX | 5 mi |
| 77090 | Houston, TX | 5.1 mi |
| 77338 | Humble, TX | 7 mi |
| 77032 | Houston, TX | 7.1 mi |
| 77380 | Spring, TX | 7.2 mi |
| 77068 | Houston, TX | 7.2 mi |
| 77014 | Houston, TX | 7.3 mi |
| 77365 | Porter, TX | 7.6 mi |
| 77389 | Spring, TX | 8.2 mi |
| 77067 | Houston, TX | 8.4 mi |
Questions about 77373
What is the ZIP+4 code for 77373?
77373 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 77373, you need to look up a specific street address to get them.
What city is 77373?
77373 is assigned to Spring, Texas, in Harris 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.