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Zip Code 81647 — New Castle, CO

ZIP Code 81647 is associated with New Castle, CO, in Garfield County. The listed population estimate is 6,882; estimated density is 9.3 people per square mile. Among records with population estimates, it ranks #4 of 6 in Garfield County and #200 of 512 in CO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.579720, -107.536400)

Data MetricLocal Statistic
Postal / Zip Code81647
Primary CityNew Castle
State / ProvinceCO
CountyGarfield
Total Population6,882
Population Density9.3 people/sq mi
TimezoneAmerica/Denver

How 81647 Compares

MetricZIP 81647Garfield County recordsCO records
Population estimate6,88249,285 (sum)5,862,421 (sum)
Population Density9.3 /sq mi----
County population rank#4 of 6----
State population rank#200 of 512----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CO

ZIP CodeCityDistancePopulation estimate
ZIP 81652Silt10.3 mi6,271
ZIP 81601Glenwood Springs11.1 mi16,844
ZIP 81624Collbran26.3 mi1,492
ZIP 81637Gypsum26.7 mi10,744
ZIP 81635Parachute28.1 mi7,486

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 →