ZIP code · Basalt · Colorado · United States
ZIP code 81621 — Basalt
ZIP code 81621 serves Basalt, Colorado.
- Postal code
- 81621Single source Value from one source, not cross-checked.
- City
- Basalt
- County
- Eagle FIPS 08037
- State
- Colorado
- Country
- United States
- Coordinates
- 39.3535, -106.9988 — precision precise (locality)
View on OpenStreetMap - Population
- 6,349 (ZCTA, ACS 5-year)
- Population density
- 25 / sq mi
- Land area
- 258.7 sq mi (670 km²) (ZCTA, ACS 5-year)
- Median household income
- $103,721
- Per-capita income
- $64,337
- Median age
- 44.1
- Households
- 2,704
- Housing units
- 3,145
- Median home value
- $1,138,500
- Median gross rent
- $2,220 / month
- Congressional district
- CO-3 (119th Congress)
- USDA hardiness zone
- 6a (-10 to -5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Denver (UTC−7 / UTC−6 DST)
- Area code
- 970Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 81621 with another ZIP · ZIPs within 25 miles · distance from 81621
Map of ZIP code 81621
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 9°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 38 | 46 | 55 | 65 | 77 | 82 | 80 | 72 | 60 | 45 | 34 |
| Avg low °F | 9 | 12 | 21 | 28 | 35 | 42 | 48 | 47 | 40 | 29 | 19 | 9 |
| Precip in | 1.1 | 0.9 | 1.0 | 1.8 | 1.5 | 0.9 | 1.6 | 1.5 | 1.4 | 1.3 | 1.0 | 0.8 |
NOAA 1991–2020 climate normals from the nearest station: ASPEN PITKIN CO AP (11.4 mi) · NOAA NCEI
Places in ZIP 81621
- 1 schools
- 1 supermarkets
- 4 restaurants & cafés
- 1 bars & pubs
- 3 parks
- 2 playgrounds
- 1 gyms & sports centres
- 1 places of worship
- 1 gas stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page