Colorado Gazetteer > Colorado ZIP Codes > Keystone, CO ZIP Codes

Keystone, CO ZIP Codes

IMPORTANT NOTE:

  • The US Postal Service (USPS) recognizes just 1 community in Colorado named "Keystone".
  • The USGS Geographic Name Information System (GNIS) recognizes 3 populated places in Colorado named "Keystone".
  • The populated place recognized by the USPS is typically the largest & most prominent community with that name.

Links to ZIP Code profiles with maps.

Keystone, CO 80435