Basalt Colorado ZIP Codes
Basalt holds a single ZIP code.
Every ZIP code in Basalt
| ZIP code | County |
|---|---|
| 81621 | Eagle County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Basalt codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Basalt. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Basalt ZIP code begins 816. Those first three digits identify the sectional center facility that processes mail for this part of Colorado. Statewide that range covers 38 ZIP codes, so Basalt accounts for 3% of it.
Every Colorado ZIP prefix and the region it covers →
Area codes covering Basalt
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Basalt occupies.
Basalt Colorado area codes in full →
Where Basalt's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Basalt
| City | Distance | ZIP codes |
|---|---|---|
| Carbondale Colorado ZIP codes | 9.1 mi | 1 ZIP code |
| Snowmass Colorado ZIP codes | 12 mi | 1 ZIP code |
| Snowmass Village Colorado ZIP codes | 12 mi | 1 ZIP code |
| Aspen Colorado ZIP codes | 17 mi | 2 ZIP codes |
| Gypsum Colorado ZIP codes | 18 mi | 1 ZIP code |
| Glenwood Springs Colorado ZIP codes | 20 mi | 2 ZIP codes |
| Eagle Colorado ZIP codes | 23 mi | 1 ZIP code |
| New Castle Colorado ZIP codes | 29 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.