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 Boone County, Illinois.

Residents of Boone 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 Boone County, Illinois Post Office

Belvidere Post Office

View Details Call Now (815) 547-5457

Belvidere Post Office

Address
Get Direction
Hours

Caledonia Post Office

View Details Call Now (815) 765-2023

Caledonia Post Office

Address
Get Direction
Hours

Capron Post Office

View Details Call Now (815) 569-2100

Capron Post Office

Address
Get Direction
Hours

Garden Prairie Post Office

View Details Call Now (815) 597-2941

Garden Prairie Post Office

Address
Get Direction
Hours

Poplar Grove Post Office

View Details Call Now (815) 765-1572

Poplar Grove Post Office

Address
Get Direction
Hours

Residents of Boone 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 Boone, Winnebago.