Post offices serve all communities within a county, from city branch locations to rural contract postal units that serve smaller towns and unincorporated areas with essential mail services. There are 12 Post Office locations in Williamson County, Illinois.
Residents of Williamson County should be aware that rural post offices and contract postal units may have limited hours compared to full-service branches. USPS provides a free package pickup service for all residents, including those in rural areas, which can eliminate the need to travel to a post office for outgoing packages.
List of Williamson County, Illinois Post Office
Cambria Post Office
Carterville Post Office
Colp Post Office
Creal Springs Post Office
Marion Center Post Office
Johnston City Post Office
Marion Post Office
Hurst Post Office
Freeman Spur Post Office
Herrin Post Office
Pittsburg Post Office
Energy Post Office
Post Office in near by County
Residents of Williamson County can use the USPS online location finder to identify the nearest post office, rural branch, or contract postal unit and check their individual hours. Enrolling in USPS Informed Delivery is free and lets all county residents preview incoming mail and packages via email or the USPS app each morning before delivery.
You may also find Post Office locations in neighboring counties including Williamson, Franklin, Jackson.