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 5 Post Office locations in Clark County, Illinois.

Residents of Clark 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 Clark County, Illinois Post Office

Casey Post Office

Address
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Hours

Marshall Post Office

View Details Call Now (217) 826-5311

Marshall Post Office

Address
Get Direction
Hours

Westfield Post Office

View Details Call Now (217) 967-5205

Westfield Post Office

Address
Get Direction
Hours

West Union Post Office

View Details Call Now (217) 279-3310

West Union Post Office

Address
Get Direction
Hours

Martinsville Post Office

View Details Call Now (217) 382-6623

Martinsville Post Office

Address
Get Direction
Hours

Residents of Clark 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 Clark, Cumberland, Jasper.