ZIP Code 81001 — Pueblo, CO
81001 is a standard (street delivery) ZIP code serving Pueblo, Colorado, in Pueblo 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 81001 at a glance
| ZIP code | 81001 |
|---|---|
| Primary city | Pueblo |
| State | Colorado (CO) |
| County | Pueblo FIPS 08101 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 31,197 |
| Coordinates | 38.295250, -104.537800 |
How ZIP+4 works in 81001
The four digits after the hyphen encode a delivery segment inside 81001. 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 81001 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 Pueblo
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 81001.
| ZIP | City | Distance |
|---|---|---|
| 81006 | Pueblo, CO | 5.1 mi |
| 81003 | Pueblo, CO | 6.5 mi |
| 81008 | Pueblo, CO | 8.3 mi |
| 81007 | Pueblo, CO | 14.1 mi |
| 81025 | Boone, CO | 15.2 mi |
| 81005 | Pueblo, CO | 17.7 mi |
| 81022 | Avondale, CO | 18.9 mi |
| 81004 | Pueblo, CO | 19.4 mi |
| 80817 | Fountain, CO | 21.2 mi |
| 80928 | Colorado Springs, CO | 24.7 mi |
| 81023 | Beulah, CO | 26.6 mi |
| 81019 | Colorado City, CO | 29.3 mi |
Questions about 81001
What is the ZIP+4 code for 81001?
81001 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 81001, you need to look up a specific street address to get them.
What city is 81001?
81001 is assigned to Pueblo, Colorado, in Pueblo 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.