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 9 Post Office locations in Grundy County, Illinois.

Residents of Grundy 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 Grundy County, Illinois Post Office

Coal City Post Office

View Details Call Now (815) 634-4501

Coal City Post Office

Address
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Hours

Mazon Post Office

Address
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Hours

Morris Post Office

View Details Call Now (815) 942-0345

Morris Post Office

Address
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Hours

Gardner Post Office

View Details Call Now (815) 237-2262

Gardner Post Office

Address
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Hours

Braceville Post Office

View Details Call Now (815) 237-2627

Braceville Post Office

Address
Get Direction
Hours

Kinsman Post Office

View Details Call Now (815) 392-4279

Kinsman Post Office

Address
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Hours

Minooka Post Office

View Details Call Now (815) 467-6360

Minooka Post Office

Address
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Hours

South Wilmington Post Office

View Details Call Now (815) 237-2646

South Wilmington Post Office

Address
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Hours

Verona Post Office

View Details Call Now (815) 287-2224

Verona Post Office

Address
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Hours

Residents of Grundy 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 Grundy, Will, Livingston.