ZIP Code 81138

  • Zip Code: 81138
  • Type: POBox
  • Official USPS city name: Jaroso
  • Official USPS State Code: CO
  • Official State Name: Colorado
  • ZCTA: TRUE
  • Population: 45.0
  • Density: 0.8
  • Primary Official County Code: 8023
  • Primary Official County Name: Costilla
  • Official County Name: Costilla
  • Official County Code: 8023
  • Imprecise: FALSE
  • Military: FALSE
  • Timezone: America/Denver (05:50 AM Wednesday, July 23 2025-07-23 (GMT -0600))
  • Geo Point: 37.02646, -105.62276


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