Home > CO > Costilla County > Blanca > Zip 81123

Zip Code 81123 — Blanca, CO

81123 is a ZIP Code associated with Blanca, CO, located within Costilla. The postal region supports an estimated population of 606 residents across Data Pending housing units, with a population density of 1.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.404690, -105.565900)

Data MetricLocal Statistic
Postal / Zip Code81123
Primary CityBlanca
State / ProvinceCO
CountyCostilla
Total Population606
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1.6 people/sq mi
TimezoneAmerica/Denver

How 81123 Compares

MetricZIP 81123Costilla CountyCO State Average
Population6065,1745,862,421
Median IncomeData PendingN/AN/A
Population Density1.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 81133Fort Garland13.4 mi1,085N/A
Zip 81151Sanford14.4 mi1,716N/A
Zip 81101Alamosa16.4 mi15,550N/A
Zip 81146Mosca17.8 mi637N/A
Zip 81126Chama20.7 mi506N/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 →