ZIP Code 77303 — Conroe, TX
77303 is a standard (street delivery) ZIP code serving Conroe, Texas, 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 77303 at a glance
| ZIP code | 77303 |
|---|---|
| Primary city | Conroe |
| State | Texas (TX) |
| County | Montgomery FIPS 48339 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 28,854 |
| Coordinates | 30.375690, -95.379370 |
How ZIP+4 works in 77303
The four digits after the hyphen encode a delivery segment inside 77303. 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 77303 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 Conroe
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 77303.
| ZIP | City | Distance |
|---|---|---|
| 77301 | Conroe, TX | 5.6 mi |
| 77378 | Willis, TX | 5.7 mi |
| 77306 | Conroe, TX | 7.7 mi |
| 77304 | Conroe, TX | 8.7 mi |
| 77302 | Conroe, TX | 10.4 mi |
| 77318 | Willis, TX | 10.9 mi |
| 77328 | Cleveland, TX | 11.6 mi |
| 77384 | Conroe, TX | 12 mi |
| 77358 | New Waverly, TX | 12.9 mi |
| 77385 | Conroe, TX | 13.1 mi |
| 77372 | Splendora, TX | 14.8 mi |
| 77381 | Spring, TX | 15.5 mi |
Questions about 77303
What is the ZIP+4 code for 77303?
77303 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 77303, you need to look up a specific street address to get them.
What city is 77303?
77303 is assigned to Conroe, Texas, 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.