ZIP code · Amherst · Colorado · United States
ZIP code 80721 — Amherst
ZIP code 80721 serves Amherst, Colorado.
- Postal code
- 80721Single source Value from one source, not cross-checked.
- City
- Amherst
- County
- Phillips FIPS 08095
- State
- Colorado
- Country
- United States
- Coordinates
- 40.6824, -102.1706 — precision precise (locality)
View on OpenStreetMap - Population
- 285 (ZCTA, ACS 5-year)
- Population density
- 3 / sq mi
- Land area
- 88.5 sq mi (229.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $100,625
- Per-capita income
- $24,158
- Median age
- 22.5
- Households
- 79
- Housing units
- 79
- Median home value
- $337,100
- Congressional district
- CO-4 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °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
- 970 (from the nearest rate centre)Telephone 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 80721 with another ZIP · ZIPs within 25 miles · distance from 80721
Map of ZIP code 80721
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 13°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 42 | 44 | 54 | 62 | 71 | 83 | 88 | 86 | 79 | 65 | 53 | 42 |
| Avg low °F | 13 | 15 | 23 | 31 | 43 | 53 | 59 | 56 | 47 | 33 | 21 | 13 |
| Precip in | 0.3 | 0.5 | 0.9 | 1.9 | 2.8 | 2.8 | 2.8 | 2.4 | 1.4 | 1.2 | 0.5 | 0.4 |
NOAA 1991–2020 climate normals from the nearest station: HOLYOKE (13.0 mi) · NOAA NCEI
Places in ZIP 80721
- 1 parks
- 1 playgrounds
- 1 post offices
- 1 places of worship
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