Keystone zip code
Zip code in Keystone, CO
The location Keystone belongs to Summit County, state of Colorado. Keystone has been assigned with the zip code 80435.
The location name Keystone is listed as acceptable by the US Postal Service so it can be used in your mailings just fine. You can also use any of the following names: Keystone, Montezuma.| Zip code | Type | Population |
|---|---|---|
| 80435 | STANDARD | 7,940 |
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