ZIP Code 80435 — Dillon, CO
80435 is a standard (street delivery) ZIP code serving Dillon, Colorado, in Summit 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 80435 at a glance
| ZIP code | 80435 |
|---|---|
| Primary city | Dillon |
| State | Colorado (CO) |
| County | Summit FIPS 08117 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 8,715 |
| Coordinates | 39.601610, -105.924520 |
How ZIP+4 works in 80435
The four digits after the hyphen encode a delivery segment inside 80435. 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 80435 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 80435.
| ZIP | City | Distance |
|---|---|---|
| 80476 | Silver Plume, CO | 8.4 mi |
| 80424 | Breckenridge, CO | 10.3 mi |
| 80444 | Georgetown, CO | 10.5 mi |
| 80438 | Empire, CO | 13.3 mi |
| 80443 | Frisco, CO | 14.6 mi |
| 80452 | Idaho Springs, CO | 19 mi |
| 80436 | Dumont, CO | 19.4 mi |
| 80448 | Grant, CO | 19.8 mi |
| 80498 | Silverthorne, CO | 20.1 mi |
| 80475 | Shawnee, CO | 21.3 mi |
| 81657 | Vail, CO | 21.6 mi |
| 80442 | Fraser, CO | 21.8 mi |
Questions about 80435
What is the ZIP+4 code for 80435?
80435 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 80435, you need to look up a specific street address to get them.
What city is 80435?
80435 is assigned to Dillon, Colorado, in Summit 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.