Puerto Rico is the biggest of 5 United States insular territories. I cannot speak for the ones in the Pacific, but at least Puerto Rico and US Virgin Islands are served by US Postal Service (usps.com):
Wikipedia says:
"Puerto Rico is allocated the ZIP codes 00600 to 00799 and 00900 to 00999; the 008xx codes are allocated to the nearby United States Virgin Islands. Both Puerto Rico and the U.S. Virgin Islands are served from the sectional center facility (SCF) of San Juan, Puerto Rico."
Whenever we place orders we select county: United States, and State: Puerto Rico. However, I couldn't find this option in your site.
Wikipedia says:
"Puerto Rico is allocated the ZIP codes 00600 to 00799 and 00900 to 00999; the 008xx codes are allocated to the nearby United States Virgin Islands. Both Puerto Rico and the U.S. Virgin Islands are served from the sectional center facility (SCF) of San Juan, Puerto Rico."
Whenever we place orders we select county: United States, and State: Puerto Rico. However, I couldn't find this option in your site.