ZIP Code 80138 — Parker, CO
80138 is a standard (street delivery) ZIP code serving Parker, Colorado, in Douglas 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 80138 at a glance
| ZIP code | 80138 |
|---|---|
| Primary city | Parker |
| State | Colorado (CO) |
| County | Douglas FIPS 08035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 36,895 |
| Coordinates | 39.516490, -104.671140 |
How ZIP+4 works in 80138
The four digits after the hyphen encode a delivery segment inside 80138. 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 80138 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 Parker
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 80138.
| ZIP | City | Distance |
|---|---|---|
| 80016 | Aurora, CO | 6 mi |
| 80134 | Parker, CO | 6.2 mi |
| 80107 | Elizabeth, CO | 8.9 mi |
| 80015 | Aurora, CO | 10.1 mi |
| 80112 | Englewood, CO | 10.7 mi |
| 80108 | Castle Rock, CO | 10.9 mi |
| 80013 | Aurora, CO | 11.2 mi |
| 80124 | Lone Tree, CO | 11.8 mi |
| 80018 | Aurora, CO | 12 mi |
| 80111 | Englewood, CO | 12.9 mi |
| 80014 | Aurora, CO | 13.5 mi |
| 80130 | Littleton, CO | 13.5 mi |
Questions about 80138
What is the ZIP+4 code for 80138?
80138 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 80138, you need to look up a specific street address to get them.
What city is 80138?
80138 is assigned to Parker, Colorado, in Douglas 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.