USPS - Sunny Isle Post Office Posted on March 9, 2021 (May 2, 2025) by myviadmin USPS - Sunny Isle Post Office Zip Code 00823… Claimed 1 2 3 4 53.001 St. Croix Post Office Service Bookmark Contact Information Sunny Isle 340-778-6805 https://tools.usps.com/locations/home... LocationSt. Croix Get Directions By car By public transit Walking Bicycling Detailed Information Accessible Beach Front Outdoor Indoor American Express Travelers Check Personal Check Discover Mastercard Visa Cash Sunday Closed Monday 7:30 am - 5:00 pm Tuesday 7:30 am - 5:00 pm Wednesday 7:30 am - 5:00 pm Thursday 7:30 am - 5:00 pm Friday 7:30 am - 5:00 pm Saturday 7:30 am - 12:00 pm