Home > CO > Phillips County > Amherst > Zip 80721

Zip Code 80721 — Amherst, CO

80721 is a ZIP Code associated with Amherst, CO, located within Phillips. 80721 ranks #3 out of 4 ZIP codes in Phillips County by population (and #445 out of 527 in CO). The area supports an estimated population of 257 residents across Data Pending housing units, with a population density of 1.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.688210, -102.152970)

Data MetricLocal Statistic
Postal / Zip Code80721
Primary CityAmherst
State / ProvinceCO
CountyPhillips
Total Population257
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1.1 people/sq mi
TimezoneAmerica/Denver

How 80721 Compares

MetricZIP 80721Phillips CountyCO State Average
Population2574,779 (Total)5,862,421 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density1.1 /sq mi----
County Pop Rank#3 of 4----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 80734Holyoke13.5 mi2,999N/A
Zip 80737Julesburg14.1 mi1,420N/A
Zip 80746Paoli16.9 mi37N/A
Zip 80744Ovid17.7 mi615N/A
Zip 80749Sedgwick24.6 mi264N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →