Clay County Post Office

Find Clay County Florida post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Fleming Island Retail Post Office 1880 East West Parkway Fleming Island FL 32003 904-264-1388


Green Cove Springs Post Office 500 Palmer Street Green Cove Springs FL 32043 904-284-9442

Keystone Heights Post Office 110 Northeast Commercial Circle Keystone Heights FL 32656 352-473-4675

Lake Geneva Post Office 7921 Highway 100 Keystone Heights FL 32656 352-473-4661

Middleburg Post Office 2073 Palmetto Street Middleburg FL 32068 904-282-5721

Orange Park Mall Post Office 1910 Wells Road Orange Park FL 32073 904-215-9814

Orange Park Post Office 1335 Kingsley Avenue Orange Park FL 32073 904-264-1388

Penney Farms Post Office 4380 Lewis Avenue Green Cove Springs FL 32043 904-529-9611

Ridgewood Post Office 225 College Drive Orange Park FL 32065 904-272-2709

About Clay County Post Offices

Clay County Post Offices are branch locations of the customer service postal facilities of the United States Postal Service (USPS) in Clay County, FL. The USPS is an independent agency of the federal government that provides mail and package delivery services to all states and territories. Clay County post offices are supported entirely by revenues generated by their own operations. Operational authority over the USPS lies with a Board of Governors and rate setting authority falls under the Postal Rate Commission.

You may contact the Post Office for questions about:
  • Clay County Post Office hours and locations
  • Mail and package delivery services
  • Clay County PO Box services
  • Passport applications and renewals
  • Clay County Post Office jobs and employment
USPS Mail Services

The USPS uses a vast network of Post Offices, Processing and Distribution Centers, Priority Mail Processing Centers, Air Mail Centers, and Bulk Mail Centers to sort, process, distribute, and deliver mail. Clay County Post Offices serve as one of the primary points of customer contact in the mail delivery process.

Clay County Mail Delivery Services

Post Offices in Clay County accept mail and packages from senders, offering a range of mailing and pricing options. The most common form of mail delivery, and one for which the Clay County USPS has a legal monopoly, is residential first-class mail. First-class mail is designed for envelopes and lightweight packages, and it provides delivery to any location in the U.S. at a flat rate of one first-class mail stamp. Multiple other mailing options are available for letters and packages of any size. Priority mail options provide faster delivery at a higher cost than first-class mail. Clay County Post Offices sell stamps, shipping supplies, and certain collectors' and gift items. Customers can also choose Registered, Certified, and Return Receipt mail for varying degrees of verification of an item's delivery. Post Offices also sell money orders. Shipping and customs forms are also available at Clay County Post Offices.

Clay County PO Boxes

Businesses and residential customers can also use the Post Office to receive their mail instead of choosing delivery to their door. Post Office Boxes, also called P.O. Boxes, are available for rent in multiple sizes for a monthly rental fee.

Clay County Passport Applications & Renewals

The Clay County Post Office provides passport services. Passport services in Clay County may include help with renewing passports, applying for a new passport, changing names on a passport, and processing expedited passport services. Passport acceptance services provided by Clay County Post Offices often require having a scheduled appointment.