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Zip Code 80121 — Littleton, CO

80121 is a ZIP Code associated with Littleton, CO, located within Arapahoe. 80121 ranks #15 out of 17 ZIP codes in Arapahoe County by population (and #131 out of 527 in CO). The area supports an estimated population of 18,029 residents across Data Pending housing units, with a population density of 965.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.610450, -104.954210)

Data MetricLocal Statistic
Postal / Zip Code80121
Primary CityLittleton
State / ProvinceCO
CountyArapahoe
Total Population18,029
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density965.2 people/sq mi
TimezoneAmerica/Denver

How 80121 Compares

MetricZIP 80121Arapahoe CountyCO State Average
Population18,029605,473 (Total)5,862,421 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density965.2 /sq mi----
County Pop Rank#15 of 17----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 80122Littleton2.1 mi32,195N/A
Zip 80113Englewood2.2 mi22,976N/A
Zip 80120Littleton3.2 mi29,725N/A
Zip 80237Denver3.5 mi23,384N/A
Zip 80110Englewood3.8 mi23,825N/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 →