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 13 Post Office locations in Clinton County, Illinois.

Residents of Clinton 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 Clinton County, Illinois Post Office

Breese Post Office

View Details Call Now (618) 526-7912

Breese Post Office

Address
Get Direction
Hours

Aviston Post Office

View Details Call Now (618) 228-7759

Aviston Post Office

Address
Get Direction
Hours

Bartelso Post Office

View Details Call Now (618) 765-2150

Bartelso Post Office

Address
Get Direction
Hours

Beckemeyer Post Office

View Details Call Now (618) 227-8698

Beckemeyer Post Office

Address
Get Direction
Hours

Albers Post Office

View Details Call Now (618) 248-5158

Albers Post Office

Address
Get Direction
Hours

Germantown Post Office

View Details Call Now (618) 523-4726

Germantown Post Office

Address
Get Direction
Hours

Huey Post Office

Address
Get Direction
Hours

Hoffman Post Office

View Details Call Now (618) 495-2632

Hoffman Post Office

Address
Get Direction
Hours

Carlyle Post Office

View Details Call Now (618) 594-3322

Carlyle Post Office

Address
Get Direction
Hours

New Baden Post Office

View Details Call Now (618) 588-4733

New Baden Post Office

Address
Get Direction
Hours

Keyesport Post Office

View Details Call Now (618) 749-5252

Keyesport Post Office

Address
Get Direction
Hours

Trenton Post Office

View Details Call Now (618) 224-9412

Trenton Post Office

Address
Get Direction
Hours

Summerfield Post Office

View Details Call Now (618) 934-3461

Summerfield Post Office

Address
Get Direction
Hours

Residents of Clinton 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 Washington, Clinton.