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Zip Code 81151 — Sanford, CO

ZIP Code 81151 is associated with Sanford, CO, in Costilla County. The listed population estimate is 1,716; estimated density is 2.3 people per square mile. Among records with population estimates, it ranks #1 of 6 in Costilla County and #290 of 512 in CO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.233760, -105.715060)

Data MetricLocal Statistic
Postal / Zip Code81151
Primary CitySanford
State / ProvinceCO
CountyCostilla
Total Population1,716
Population Density2.3 people/sq mi
TimezoneAmerica/Denver

How 81151 Compares

MetricZIP 81151Costilla County recordsCO records
Population estimate1,7165,174 (sum)5,862,421 (sum)
Population Density2.3 /sq mi----
County population rank#1 of 6----
State population rank#290 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 81141Manassa11.1 mi1,406
ZIP 81123Blanca14.4 mi606
ZIP 81138Jaroso15.3 mi17
ZIP 81148Romeo15.5 mi387
ZIP 81101Alamosa18.1 mi15,550

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 →